Hex Comparison 1 82 Serial Podcast

73 Magazine Information & Index 73 Magazine Information A rather insane project. By KB9MWR Overview (also known as 73 Amateur Radio Today) was an amateur radio magazine that was published from October 1960 to. (That's 514 issues, with about 8619 articles, and over 64,000 pages).

It was known for its strong emphasis on technical articles and for the lengthy editorials in each issue by its founder and publisher, (W2NSD). Prior to beginning his own publications, started an amateur radio teletype newsletter. Within a couple of years, he had 2,000 subscribers.

October 1960 (#1) Audio Booster - A three transistor amplifier that hooks across the mike to give you more talk power for SSB or AM without distortion. Sep 28, 2013. Up vote 1 down vote. If possible to use the List type, we can make use of the built in methods Max() and Min() to identify the largest and smallest numbers within a large set of values. List numbers = new List(); numbers.Add(10); numbers.Add(30); numbers.Add(30);. Int maxItem = numbers.

He also was an editor of magazine for five years before starting his own magazine. He launched 73, a competing magazine, which promoted emerging technologies as do-it-yourself projects. A pioneer promoter of SSB, FM, solid-state, easy construction projects, and the marriage of personal computing and amateur radio. (Wayne's interest in microcomputing led him to found several of the early magazines.) Starting in the early 1960s with an army of can-do, build-it-yourself amateur radio fans behind him, encouraged readers of 73 Magazine (his first and longest-lived publication), to push the limits on the electronic bits and pieces that would evolve into today's e-mail systems, cellular networks and PCs.

He predicted the rise of the 'pico' computer, better known as the laptop. And he encouraged his readers to build a grass-roots wireless telephony network -- a nationwide array of amateur radio repeater towers that was the precursor to today's cellular networks. For him, only what's ahead matters. 'I'm always impatient with [the pace of] new technologies. I live mostly in the future,' he says. Some people have described as a visionary and entrepreneur.

He actually taught people to think. For more info see: There is also an episode of the podcast by Ted Randall which has an interview with Wayne Green:. (48M MP3) Archives Many hams have been searching for reprints or back issues floating around. I contacted Wayne to see if there was any type of CD-ROM or other archive of his magazine.

He said he didn't know of any source other than scanning in over 50,000 pages. Which he thought was daunting to sell maybe dozens of CDs. However, was one of the first to have microfilmed, and later, of the magazine. From what I have found, the microfilmed versions advertised for sale over the years were purchased by most major technical colleges.

So, never fear, it is out there as several university libraries still have it available. References: • Buckmaster microfilmed various amateur radio magazines, including 73. • Still sells the microfilmed magazine archive, but at a rather expensive price. • Quote from KA0GKT/7 at: '.the has back issues of QST, 73 and CQ magazines either in paper form or on microfiech or as PDF files. The PDF files are available via the internet only to students and faculty.' Sadly it doesn't didn't look like there will ever be an official digital archive of this magazine available for purchase.

With copyrights expire after author's lifespan plus 70 years. And the have been mixed. 73 usually only bought first publication rights and sometimes first reprint rights. One would have to get the permission of every author who had written for 73 Magazine in order to make a CD-ROM collection available. Wayne sold 73 a couple times which further complicates the matter. The transfer of copyright agreements is unclear slipper slope due to the various royalty and copyright issues that existed between contributing authors and 73 Magazine. () However, many authors have said they are okay with having their articles reprinted as long as its at no charge.

As I have said before,, but you'll have to use your conscience to as a guide to whether or not obtaining such an archive is legal, moral, and/or ethical. Update Dec 2011 An Christmas gift was bestowed up on us. The Internet Archive received a voluntary contribution to the public domain by 73 magazine publisher, Wayne Green W2NSD. Magazine articles were scanned, quality corrected, and index by an army of individuals, and collected together for Internet Archive by Jason Scott of was started by internet pioneer Brewster Kahle in 1996, with the goal of archiving internet history. While the resulting 'Wayback Machine' is one of their best known projects, the Archive also engages in curated projects, such as the recent archive of all TV coverage on 9/11/01.

The 73 Magazine Collection on the Internet Archive can be found here: Other Indexes Concerning a searchable master index of articles. Didah Publishing shows up as having developed a 73 Magazine index (through 1990) computer program and book under the title 'From Beverages thru OSCAR - A Bibliography.' • • • • Used copies show up from time-to-time. • shows that there are three libraries which have that 73 Magazine index, they are: • US, CA LOS ANGLES PUB LIB Code LPU • US, DC LIBRARY OF CONGRESS Code DLC • US, NC BAKER & TAYLOR INC TECH SERV & PROD DEV Code BTCTA Here is quote about Didah Publishing's bibliography program: Q: I'm going to be building a big stack of magazines! Can I get an index for our collection? A: There is no single comprehensive index to all amateur radio and electronics literature.

The best thing you can do is check the year-end issues. You can also purchase a bibliography computer program called 'From Beverages Thru OSCAR,' published by Didah Publishing.

By entering a key word in the article description, you can search for articles on nearly every subject and locate the issue you need. The database is very comprehensive, covering many amateur radio general-interest and specialty magazines. Didah also publishes smaller, less-expensive software packages for each of most popular ham magazines. Some of their bibliographies are available in printed form, too.

Contact Didah Publishing at P.O. Box 7368, Nashua, NH 03060, (telephone 603-878-3628). You used to be able to buy the complete 'From Beverages Thru OSCAR' software package (a DOS program written by Rich Rosen, K2RR) from for $79. Rich Rosen's QRZ states: 'I created 'From Beverages Thru OSCAR - A Bibliography' after literally reading every page from QST (Jan.

'45-'90), CQ (Jan. '45-'92), Ham Radio (Mar. '68-Jun '90), 73 (Oct.

'90), and RadCom (Jan. '79-Dec '90). When I retire (soon), will bring entire database up to date, from QST issue 1 (Dec. 1915) and continue.' The following preface describes his work and wonderful resource. The printed 73 Magazine index from 1960-1990 is about 100 pages.

I suggest contacting him if this or his software would be useful to you. 'From Beverages Thru OSCAR - A Bibliography' is a 52,880 reference volume to articles written on all aspects of radio communications. The term radio communications is defined by this book in a much broader sense. It encompasses the early days of radio, at the turn of the century, in which wireless transmissions were the only form of communications. But it doesn't stop there. It continues through the 20th century to include the more advanced forms of data communications. The title 'From Beverages Thru OSCAR.'

Tells a story. Beverage is a long wire antenna that was developed in the early 20s. It, and similar type antennas made it possible to clearly receive radio signals from across the Atlantic. This antenna has stood the 'test of time' and is used today by radio amateurs, commercial services and the military. OSCAR stands for Orbiting Satellite Carrying Amateur Radio. It's a series of satellites that enable radio amateurs to communicate through a small handheld unit to others half way around tho world.

Amateur radio, is what this book is about. At least that was the initial impetus that urged me to put this massive compendium together. Radio amateurs, of which I'm proud to include myself among their rank, number almost a half million strong in the United States and are found in literally every other county in the world. They are a disparate group, speaking collectively hundreds of different languages and working in an even greater number of divers professions.

Many who have chosen to delve into the technical mysteries of radio have contributed immensely. Think of any major technological breakthrough in the field of communications and the probability is great that there were at least several radio amateurs present, advancing the state of the art. In many famous cases amateur radio discoveries were made prior to even commercial interest involvement However, only a small percentage of radio 'amateurs' publish their findings in the professional and radio journals. Instead they employ consumer magazines ( QST, CQ, Ham Radio, 73, and Radio Communication) as a conduit to express their ideas. This very fact has driven me to uncover this wealth of knowledge so that others might benefit. The production of 'From Beverages Thru OSCAR' involved the meticulous examination of 231,173 pages from 1,776 issues of these magazines.

Names that have meaning to many in the professional world jump out from those pages: Armstrong, the inventor of FM; Brown, Kraus, King, Lewis, and Schelkunoff legends in the field of antenna theory; Friis, Lamb, Rohde, Tuska, and Villard in receiver design, to name a few. These giants in the field of communications have either published in the magazines or greatly influenced the writings and efforts of others.

Related contributions in the professional annuals such as the Bell System Technical Journal, Proceedings of the IEEE, and Transaction on Antennas and Propagation are referenced as well. Access to Columbia University's Engineering Library with its immense open-shelf collection of technical journals provided me the opportunity to spend countless pleasurable hours researching communications topics. Fifteen years of a page-by-page scrutiny embodies this bibliography. It is a unique tome, definitely at least in the sense that it is the only one of its kind. My original intention was solely to locate a reference volume that included the amateur radio sources.

After a considerable search none was found. Casual lists of articles of interest just would not suffice for several reasons. First structure was needed to put some order to this information. Lack of the same had been my major complaint of previous lists that I had casually generated. But perhaps more importantly, I found myself expanding my areas of interest at an accelerating pace.

Many interesting articles that I had accidentally come across were too precious to let slide back into the closed pages of some dusty volume. A workable format was developed in several months. Though New York City certainly has its share of fine technical libraries, I knew that I needed to have more immediate access to at least the amateur radio journals. The acquisition of entire collections of those magazines became a project in its own right. As the expression goes, the rest is history - culminating in this 1,260 page communications reference volume.

For those of us who have ever become frustrated in looking through indices of article titles without being able to decipher the subject matter - this bibliography is for you. Don't expect to find catchword phrases within. Each article reference contains a short abstract that clearly indicates the theme. Anyone who works nine years as a technical editor and reviews over a quarter of a million pages should have the ability to quickly review articles and capture their essence in a few succinct words.

Expect it to be comprehensive. Each page of QST from January 1945 to present, and every page of CQ, Ham Radio and 73 Magazine from their premiere issues were personally reviewed.

In addition, selected references from 289 other sources have boon included. Those sources are world-recognized journals, society reviews, trade magazines and technical publications from laboratories, agencies and industry.

Most of them are available in the larger technical libraries or can be obtained on a loan basis. And what if you can't locate some of the sources? With an average of 575 article references per subject area anyone with even half of the sources should be able to acquire an in-depth knowledge of the subject.

References are entered in reverse chronological order, the most recent information appears first. Some subjects include references that go back 80 years. For example, in the area of propagation - chapter 5's first reference is March 1909! Naturally, more recent technical topics such as computers only include early references to articles published in the 1960s. Earlier editions of this bibliography were published. The first: 'From Beverages Thru OSCAR - A Bibliography' contained references through December 1978.

The second edition: 'From Beverages Thru OSCAR - A Bibliography, Addendum 1979-1981' was a three year update to the first volume. This latest rendition not only encompasses completely rewritten and reformatted earlier editions but contains new source and reference material as well. In addition it includes a 100 page 5,000 word keyword index and 23 page author index to assist the user in rapidly locating articles of interest. Knowledge, generated by many, is similar to a country's untapped resources. It remains hidden beneath the surface of subtle or innocuous titles until the proper tool is found and utilized. This bibliography can be that tool. Index Information What you see here is phase two of a long project.

This index project was inspired by and dedicated to, W2NSD himself. For the vast technical information in all his years of dedication to the publication and hobby. It is also inspired by the work of Rich Rosen, K2RR. And by Bill Griffith, VE3WGX for his work. These three dedicated themselves, which prompted me to say, so can I. A special thanks to the daughter of N9AVO/W9LML, Edward Harrigan (SK) who sparked my interest in the whole thing by donating a few decades of the magazine to our club years ago. Also thanks to Buckmaster for microfilming the magazine, the and the interlibrary loan staff who helped me track these indexes down, and various other hams.

What follows is about a years worth of on and off work. This data was generated by scanning and OCR software, errors likely exist. To the best of my knowledge it is now complete (December 4, 2009). This index is freely sharable, but please contact me if you plan to redistribute it commercially. It is meant as a free public resource for those who have stacks of these wonderful magazines in their basements (as I have). Enjoy -, KB9MWR 73 Magazine Index Yearly quick links: October 1960 (#1) • Audio Booster - A three transistor amplifier that hooks across the mike to give you more talk power for SSB or AM without distortion. K5JKX/6 • Something New in FM - Using the new varicap as a FM modulator.

W7CSD 10 • Bantam Converters - Two-tube VHF converters for 50-108-144-152-220 MHz bands. W9DUT 12 • Risky Hobby - How to fall off your tower for fun and profit. K9AMD 16 • Tubeless Electronic Key - Just uses some relays.

Also tells how to convert your bug. W1TUW 18 • Digest of Surplus - Short lecture tour through your local surplus emporium. W1MEG 20 • Direct Reading Capacity Meter - Two transistors. You've got a lot of resistance if you can keep from building this gadget. W6EAW 22 • Gotta Patch? - Instructions for phone patching and avoiding trouble. W6KNE 24 • Three-Way Power Supply - 6, 12, 120 volt supply using kit-available parts.

W3UZN 26 • Shock - New facts on electric shock, or what to do until rigor mortis sets in. Bates 28 • Propagation Charts - What bands what time to where probably. K2IGY 30 • Three Tubes, Five Watts, Six Meters - How to get on Six in a hurry. K8NIC/5 32 • How To Be An Amateur - For adults only. Children under 16 not admitted. W2ZGU 34 • Testing the Heath GC-1A - Well, well!

A transisorized communications receiver! 73 Staff 38 • Modulation Fundamentals - This is our big technical article for the month. W0TKU 42 November 1960 (#2) • Transistorized 10 Meter Converter - Not only that, but it uses a printed circuit you can make. W3BUL 9 • Four Band Crystal Converter - 20-15-10-6 meters using the new International Crystal converters. W3UZN 12 • FM VFO Exciter - Butchered BC-459 for 6 and 2 meter FM or NFM operation.

W1TUW 14 • Mobile Power - How to put some beef into that mobile signal. K5JKX/6 16 • Cardboard Chassis - Building on the kitchen table. How easy can we make it? K5JKX/6 18 • Stop That Noise - This is our technical article of the month: Noise Clipping, etc. 73 Staff 20 • Measure Your Modulation - Overlay for your 'scope to get modulation percentage. K5JKX/6 25 • Some Hard Facts About Echo - The Moon makes a better reflector.

W6MMU 26 • Improving Performance of the Communicator III - A new front-end tube that improves the S/N considerably. W1MCA 28 • VHF Tri-Mode Receiver - AM-CW-SSB tuner to go with last month's Bantam Converters. W9DUT 30 • Toroid Coils - Quickie think article plus an idea on mounting 'em. Paffenberg 37 • $5 Frequency Counter - Two transistors and it reads 0-300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz. K5JKX/6& 38 • Wabbit Ears - 20 meter dipole, compacted slightly.

W6EHY 41 • Propagation Forecast - What bands what time to where.Probably. K2IGY 42 • Equipment Manuals - Special article for manufacturers. K2DHA 44 • Finding True North - How to zero in your beam on the North Star. W5LFM 49 December 1960 (#3) • Transistorized 220 MHz Converter - Crystal controlled too. W3HIX 8 • RF Sniffer - Snooper sensitive RF detector which you will build. K5JKX/6 11 • SSB Dynamic Demonstrator - Teaching SSB calls for some tricky stratagems. W2UQB 12 • Capacity Meter - Two ranges: 0-40 pF (resolves 1 pF) and 0-900 pF.

K8ERV 14 • Station Control System - Even if you don't build this one it will give you ideas. W1TUW 16 • The Multivibrator in VOX Circuitry - Technical article ending up with a corker of a VOX circuit. Paffenberg 18 • The Fine Art of Transistorizing - Changing your tube circuits to transistors. K5JKX/6 22 • Simplify Your Log Keeping - Just an idea which you probably won't like anyway. Staff 25 • Perfect Squelch - Our big technical article for the month. All about squelching. Staff 26 • Low-Noise Two Meter Converter - The newest, the latest, the hottest 417A converter yet.

ZL1AAX 32 • Surplus Frequency Standard - Simple conversion or the VO-4 oscillator. You'll like it.

Paffenberg 40 • Simple Phone Patch Herb Brier - This one is pretty simple and effective. Next month a simpler one. W9EGQ 42 • New Tube Base Coil Forms - OC3W, 5R4WGA. Etc, bases make splendid coil forms. Paffenberg 44 • Propagation Forecast - What bands what time to where.

K2IGY 50 January 1961 (#4) • Nuvistor Converters for Six and Two - 417A performance without 417A cost. K8ERV 8 • Down With Drift - Step-by-step stabilization of your receiver. K5JKX/6 12 • 6N2 Completed - Eico, Heath, and Johnson kits add up to 100 watts on Six and Two. W3UZN 14 • 1296 MHz - Secret confessions of an UHF addict. K2TKN 16 • Goblin Patrol - Hams team up with cops to louse up Halloween for the kids. W8UCY 18 • Lost in a Tunnel - Pioneering frustrations of a diode speilunker. K5JKX/6 20 • 8 MHz Crystal Modification Kit - For thee who art long on 8 MHz rocks.

W3UZN 24 • Transistorized Frequency Standard - Think of all the advantages. W7OE 26 • Suction or Whoosh - One is better, but you'll never know which unless you read the article. W6JAT 28 • Transistorized Communications Receiver - Just to show you what you can do if you really want to.

OZ7BQ 30 • Vertical Radiator - To warm the ether, not your shack. W7OE 36 • AM Detectors - Our big technical article for the month. Guaranteed both interesting and informative. Staff 40 • Switch from the T-17 - The fine art of surplus scavenging. Paffenberg 51 • Propagation Forecast - What bands what time to where probably.

K2IGY 52 • Spot Frequency Operation of VHF Nets - How to herd everybody on to the same channel. W0HKF 54 • See-Saw Bleeder - Save power and get better regulation this away. KV4CI 56 February 1961 (#5) • Rolling Your Own - We're determined that you're going to build something. K5JKX/6 11 • Amplifier for Varicap Modulator - More for gain for the modulator in our October issue. W7CSD 16 • World's Simplest Phone Patch - Average construction time: five minutes.

K5JKX/6 17 • Two Meter Pip-Squeak - Complete phone rig using only three 6CX8's. K6BP 18 • Squawk - Guaranteed Houser. We should needle Ken into writing more like this.

W7IDF 20 • Six Meter Converter - For the car. Operates with only 12 volts on the plates.

K5JKX/6 22 • Heath Phone Patch - Heath does it again. Works fine for SSB also. Hey Heath, where's the ads? K2DHA 24 • Life Insurance for Transistors - These little rascals are delicate, so watch your step. K6EAW 26 • Beat Generation - Big technical article on SSB and CW detectors. Staff 28 • Updating the Absorption Wavemeter - Real handy piece of test gear, and easy to knock together.

W3FQJ 34 • Interference Chaser - Easy way of getting audio break-thru out of TV sets and things. K5JKX/6 35 • Getting the Most Out of Your Mobile Whip - How to make the best of a miserable situation: a short vertical antenna. W4API 36 • How Modern is the VFO? W7OE 38 • EICO Grid Dip Oscillator - Our Associate Editor is still building up kits and liking 'em.

W3UZN 42 • Power for the Pro - Super-Pro owners, take note. K5JKX/6 44 • Differential Switching - Using polar relays for sensitive switching- at different current levels. Pafenberg 46 • Propagation Charts - What time to where on what bands. K2IGY 56 March 1961 (#6) • Translating Technical Journals - You'll read this one to anyone who will listen. K5JKX/6 9 • Transistorized Grid Dip Oscillator - Severing the AC umbilical cord with a transistor. W3KET 10 • Curing Ignition Interference - Step-by-step assassination of the noisy car gremlins. W8UCG 13 • Superregenrative Receivers - Ten rules for getting good results from a super-regen illustrated.

W5WGF 14 • Decreasing Debugging Time - How to get things back east when they go west. K5JKX/6 16 • Top Loaded Whip - Why not make your own mobile whip? W2IHW 18 • CW Transmission with Teletype Equipment - Simple conversion of RTTY or that hated CW identification by TT tape. Pafenberg 20 • All Band Antenna - You've been waiting for someone to adapt that Log Periodic Antenna. K5JKX/6 22 • Double Your Power Supply Voltage - Not difficult with a couple silicon rectifiers. W4API 24 • Impedances of Surplus Equipment - Input and output impedances for most popular surplus gear. Pafenberg 25 • Patch Patch - Quick method of hooking your phone patch in and out of the telephone line.

K2DHA 26 • 432 MHz Transistorized Converter - Good night! How high will they go with transistors?

Crystal controlled too. W3HIX 27 • Two Meter Transmitter - Slight modification of the 6M rig from October issue of 73. K8NIC/5 29 • Squawk Box - Transistorized loudspeaker amplifier. K5JKX/6 30 • Up Front - Rather thorough look at receiver front ends, our big technical article. Staff 32 • Don't Bug Me Dad - Our cover artist also writes.

Instructions for new bug owners. W6NKE 38 • Varicap Tuning Device - Helps the blind ham to tune up his rig. Or anyone else for that matter. W7CSD 42 • Noise Clipper, Semiconductor Style - Tiny clipper for insertion in car radios, including transistor sets. W2IHW 43 • Working 80 Meter Phone DX - WAC in one night when you know where to listen. W1FRR 44 • DC Transistorized Meter Amplifier - Get amazing sensitivity out of normal meters with this amplifier. K6EAW 46 • Motorola Test Set - Ham-banding the old Motorola mobile transceivers is popular, this helps.

W9HKA 48 • Propagation Charts for March - What time to where, when.probably. K2IGY 54 • Names, Sines and Handles - Why 'YB' calls himself 'YB'.

W7OE 56 • Save, Learn, Have Fun - It really is cheaper to build than buy. W8VVD 62 • How To File Your QSO's - More ideas on card files for contacts. OH2YV 68 April 1961 (#7) • Six Meter Nuvistor Converter - Two 6CW4's in cascade give a fearfully low noise figure. K8BYN 9 • Power Meter - Another valuable piece of test gear for the ham shack. K8ERV 12 • Surge Protection in Reverse - Protect your silicon diode power supply from destruction by shorting.

Pafenberg 13 • Let's Modulate, Not Crepitate - Getting good modulation out of a Heising Modulator. K4ZGM 14 • A New Noise Limiter - Get out the soldering iron, this one'll go in your receiver. K5JKX/6 16 • Calibration - Why we haven't got it, how much we need it. And how to get it. W4WQT 18 • Big Cannon - OK, here's a 20M kW amplifier, now stop bothering us for that. W6VVZ 20 • Tennessee Indians - The public relations side of taming those Indians.

K2SJN 25 • Half Wave Feedlines - One resonant feedline for several bands? W9HOV 27 • Automation - You didn't think we'd pass up April without one feature, did you? K5JKX/6 28 • Audio Boosting the Command Receivers - Turns out to be ridiculously simple once you know how. K8HDR 30 • Pick Up the Droop - Your beam been saggy lately? W7OE 31 • 40 Watt Transistor Modulator - Great for mobile rigs. KL7DLC 32 • Testing the Heath Two'er - You will no doubt be flabbergasted to find that Don likes the Two'er.

W3UZN 34 • RF Noise Suppression - Technical treatise on how to exorcise the noise demons from your car. K2TKN 38 • 432 MHz Transistorized Converter - Part 2 (ahem) the schematic diagram. W3HIX 40 • Take Your Pick - Big technical article: IF selectivity and the devious means used to gain it. Staff 42 • Propagation Charts for April - What time, when, to where on what bands.

K2IGY 54 • Writing for 73 - How to get rich beyond your wildest dreams. Staff 56 May 1961 (#8) • G4 Zed Smith - A tri-bander without loading coils or traps, can be tuned from the shack! W8VVD 9 • Feedline Economy - Open-wire line just may become popular again after you read this one.

W9HOV 18 • Propagation Special Feature - Taking a look at sunspot numbers with an eye to predictions. K2IGY 20 • Testing the KT-200 Receiver - Next month we have some of Bill Orr's ideas for modifying this receiver. K2DHA 22 • Ham Calendar - Just what we've been needing.

Should go nicely with a 35 hour clock. K4YNO 25 • Build a Vary-Volt - A piece of test equipment that is worth its weight in something or other. W2WYM 26 • Moonstruck - Eyewitness account. W8GUE/6 28 • Moon Chart - How to get radio signals back from the moon, reduced to a chart.

K2TKN 31 • Sideband Exciter - What with Turret construction and a simple circuit you may try this one. W2NQS 32 • Testing the Knight GDO - Porsche-pushing ham tests Knight GDO, likes it, tells all.

W2OKU 35 • Propagation Charts - What time to where, when on what bands. K2IGY 36 • Custom Resistors - How to move precision resistors to the value you need. Pafenberg 38 • AC Calibration of Your VOM - We'll be giving you more and more on precision and calibration. Bentley 40 • Ohms by the Yard - This ties in with the precision resistors on page 38. K5JKX/6 41 • Blowers - What size blower you need to keep a cool rig.

W3KET 42 • How Low The Fi - Our technical article: examining the audio stages of your receiver. Staff 44 June 1961 (#9) • Abe Lincoln - Two meter antenna for mobile or fixed. Looks awful, works great! K2TKN 8 • 75M Transistorized Converter - Nice little one evening construction project. WA6DZL 12 • Precision Capacity Measuring - Right down to a fraction of a pF. K6BJ 14 • Propagation, Part 2 - When the sunspot null will really come and what it will be like. K2IGY 16 • 73 Tests the M-100 Modulator - Just how good is that gate modulator put out by Electrotone?

W4API 20 • AM Modulation Monitor - A bit complicated, but great for perfectionists. W5SUC 24 • Modifying the KT-200 Receiver - Bill claims this is a real good deal with these few changes. W6SAI 30 • Pandapting Adaptor, Part 1 - Moderately simple device connects your receiver to your 'scope.

W6AOI 33 • Automatic Drive Control - Transistor device keeps you from over modulation. W5IUR 38 • Dear Sir - On writing to manufacturers about your miseries.

K2DHA 39 • FCC Notice - Thought you'd get a kick out of this bit of antiquity. W8ONL 41 • Do-it-Yourself IBM - Punch a few holes and get some real mileage out of a card file. K5JKX/6 44 • Power House Pros - Part 1, all about power supplies. Staff 51 • Propagation Chart - DX men please note that this is the most accurate forecast in print.

K2IGY 54 • The DX Hunter - Do's and don'ts for DX hunting. W6NKE 56 July 1961 (#10) • A Tinker-Toy for Two - Two meter antennas made out of aluminum tubing and a Tinker-Toy set. K8LFI 8 • Ready-Made Emergency Antenna - New, improved type mobile antenna. Really works out!

W7CSD 12 • Two Meter Line Amplifier - Nuvistor pre-amplifier -for hottening up your two meter converter. Bullock 14 • Amplitude Modulation Systems - Review of AM systems with special reference to an oldie you'll like.

W7CSD 18 • Globular Calculations - How to find out how far it is from anywhere to a anywhere, great circle route. K5RPB 26 • An S-Meter for Your Sixer - Or your Tenner.

Or your Tower. You don't have one?

Heath advertises. K5VMC 28 • VLF - Very Low Frequencies - A converter for the 10-100 kHz band. W3QA 29 • Little NIC Six Meter Converter - Quite wee transistorized converter. Real quick project for you.

K8NIC/5 31 • Panadapting Adaptor, Part 1! - Construction and alignment details. W6AOI 33 • Plate Modulate Your DX-40 - How to hook in an external modulator or more output from the DX-40. K6UGT 39 • Socket for the 4-1000A - The tubes are available surplus, but the sockets ouch! Here's an answer. W4API 41 • Frequency Measurement - Measuring frequency with simple equipment. Henry 42 • From My Side of the Counter - Confession from the heart of Radio Row in New York City.

W2BNW 44 • Transistor Biasing Simplified - The problem. The solution. K6EAW 45 • Powerhouse Pros, Part 2 - Designing a power supply instead of throwing it together. Staff 48 • Propagation Chart - What bands when, to where. K2IGY 56 • Band Edge Marker - 3.5 MHz oscillator gives band edge marker for all ham hands. K1NFE 58 • Transformer Action Demonstrator - Very handy for schools and theory classes.W8KTJ 64 August 1961 (#11) • Frequency Deviation Meter - Another little garget to build from the brain of one of the top hams of all time. K6BJ 6 • Noise Limiter - For the car.

Transistorized, printed circuited, and the board is available. W3BUL 8 • SSB vs.

AM - Year-by-year count of band occupancy by SSB and AM. (SSB is winning). K0AXY 12 • Square Antenna - The Bi-Square is easy to build and works out beautifully. W8GUE/6 14 • The Drake Receiver - 73 rushes you info out the new Drake 2B. Amazing receiver, as you will see.

Merritt 18 • RTTY Converter - Transistorized, printed circuit. Board available. W5SFT 24 • Two Meter Nuvistor - Cascode Converter - If one Nuvistor is good, why obviously two are better. WA2INM 28 • Versatile Control Techniques - Using those concentric TV controls in your ham rigs and receivers.

W4WKM 32 • Impedance Bridge - A whopper construction article. Details on building 'professional' equipment. K6CRT 33 • Propagation, Part 3 - Antenna height and angle of radiation importance during the coming minimum. K2IGY 42 • Simple as A-B-C - Clarification (?) of the classes of amplifiers. K5JKX/6 44 • The Romance of Dixie Dan - One of the better ham poems from our Renaissance man. W6NKE 46 • Propagation Charts for August - What time to where, when, on what bands.

Even inside the US. K2IGY 48 • Four Kinds of Ham - A general discussion of stuff you've read before. The Golden Rule again. K5JKX/6 50 • Mobile Power Converters - Transistor supply using filament transformers. W2BXE 54 • 73 Tests the Finney 6 & 2 Meter Beam - Interesting invention.

You'll want one if you read. W3UZN 56 • New Look At Old Ideas About Antennas - The old timers really knew what they were doing. We can learn a lot. K5JKX/6 • Hiss, Sputter, or Crash - Different types of noise and what to do about each of them. K5JKX/6 66 • Portable kW Transistor XMTR - Newly released (early April) transistor makes shoe box kW simple. K2PMM 72 September 1961 (#12) • Silicon Rectifiers - How not to pop 'em, a lesson for hams and engineers alike.

W1OOP 6 • Tuning Bypass Condensers - How to make a bypass bypass at the VHF's. K5JKX/6 8 • Simplescope - Perchance the title may give this one away. You need one.

W0OPA 10 • VFO Chirp vs. 6AU6 - Several VFO's use a 6AU6.

Lousy choice, try a 6AH6 instead and see. K3KMO 20 • Console - If you're going to be obstinate enough not to buy an Alden Hambench, then build this. W9HKA 22 • Class B Modulators - We'll print anything. WA2INM 28 • Eye for Resonance - How confounded simple can a GDO get? This is how simple, that's how.

K6EAW 30 • Break-In A la Transwitch - Complete station control unit, transistorized. W7AXJ 33 • Environmental Testing - Be nice to surplus gear, it has been through a lot. W2WYM 36 • Band Edge Marker - A 3.5 MHz crystal calibrates your receiver on all ham bands. WA2HZR 37 • Tell The World - Ham radio needs publicity, here's how to go about it. K5JKX/6 39 • Zero Shift Keying - A new idea, presented first in 73. You'll be hearing more about this. K5JKX/6 42 • Cross-Polarized Beam - A new approach to diversity transmission and reception.

K6CT 48 • Crystal Oscillators - This is the Big Technical article. You'll find interesting. Staff 50 • Propagation Charts. K2IGY 64 • Why a 73 Page Magazine Is Impossible - or: further developments of the kW Transistor Transmitter. K2PMM 72 October 1961 (#13) • Six Meter Linear Amplifier - 90 watts AM, 360 watts PEP SSB, 2-1/2 watts drive to pair 7378s. W2LPC 6 • Simple High Stability, VFO - 5763 osc., 5763 buffer. Colpitts circuit.

W2RWJ 14 • 73 Tests the Central 200V - It works. Staff 18 • CQ de 73 - Converting the ARA-26 surplus keyer for ham work. Inexpensive, and lots of fun.

W2WKM 22 • Like New Mixer Circuit - New way to improve sensitivity and stability of your receiver. Staff 32 • Two Meters the Easy Way - The MRT-90 packset, available surplus, makes a terrific two meter transceiver. W2WKM 36 • Useful Accessory for the Shack - You can't get along without this wavemeter/field strength meter/monitor. W2WXH/6 38 • Inexpensive Vertical - Easy to put up, tunes 80-40-15 meters, and works out fine.

W6NKE 40 • Dual Diversity Beam - This, we predict, will be a very popular DX'ing antenna. K6CT 42 • VFO Circuits - Good and bad features of all known circuits. Our big technical article. Staff 46 • Obtaining That DX License - Gus divulges his secret tactics which will soon give him a reverse DXCC. W4BPD 58 • Sequential Electronic Switch - Key VFO and final screens in sequence for clickless spark-free keying. KV4CI 62 • Propagation Charts - What time to where, on what band probably. For world and U.S.

K2IGY 64 • Send-Receive Ground Switch - Antenna switch for simple ham stations. Also keeps lightning out. Pyle 66 • Maximum Utilization from Variacs - Very useful devices. They're available surplus if you hunt around.

Even new they're worth it. W4CAG 72 • Construction Do's and Don'ts - Rules of the game.

K5JKX/6 76 • Emcar 6 - Why you should get a Porsche to go with your mobile rig. W3JXT 82 • Little Thief - Li'l one tube CW rig powered from your receiver. W3FQJ 84 November 1961 (#14) • Linear for Sunspot Lows - Do-it-yourself F2 layer. A kilowatt six meter linear for SSB. K6QQN & W6QMN 6 • Transistor Mike Pre-Amplifier - Outboard pre-amp to make up for audio deficiencies of your rig. K6PZT 10 • Transistorized RTTY Audio Oscillator - Printed circuit, generates mark and space tones for RTTY.

W5SFT 12 • Have You Met These Characters - TVI brings out some remarkable characters. K3HNP 15 • TV Tuner Receiver - The standard coil tuner makes a wonderful basis for a fine inexpensive homemade receiver.

W0RQF 16 • Solid Power - What diodes to use for what voltage power supply. K5JKX/6 20 • Phasing For Audio Selectivity - Simple gadget makes the 80M Novice band sound almost vacant. K5JKX/6 24 • Quick and Simple Mobile Rig - CB is good for something! Convert those CB rigs to 6-10-15-20M featured here.

K5JKX/6 30 • Single-Sideband Transceiver - All band, 200 watt PEP. Everything you could want in a transceiver. W6BUV 33 • A Quad for Six - The quad works excellently on six meters too, and is awfully easy to build. W3TBF/0 48 • Evolution of Antennas - Short history of the early ideas in antenna design and how they grew. W7OE 50 • Propagation Charts for November - What time, to where, when, on what bands. Including short-haul inter-U.S.

K2IGY 58 • Two Uses for a Birdie - 1) Super accurate alignment of IFs. 2) Substitute for xtal standard for bandsetting. K5JKX/6 62 • Horn Antennas - 1296 MHz requires an entirely different approach to antennas and feedlines.

T12NA 64 • Audio Hither & Thither - Connecting the tape recorder and phone patch into your rig and receiver. W3KBM 66 • Rewinding Relays and Transformers - Rewinding for different voltages or in case of failure under the smoke test. K0RRM 70 • Surplus Utilization - General discussion: where to buy, what to buy, and how to best use it after you have it. W4WKM 72 • Testing the Gonset Communicator TV - Thorough rundown of this popular piece of gear. W4API 80 December 1961 (#15) • Write Your Congressman - Making a pest out of yourself in a big way.

K7HDB 6 • Ten Meter Midget Rig. K5JKX/6 8 • Versatilizing Meters.

W2WYM 12 • Regenative Detectors. W5WGF 16 • Another Two Meter Conversion - Conversion of the R-77/ARC-3 Receiver provides continuous coverage from 100 to 156 mc, without undue sacrifice of 2 meter bandspread. W4WKM 22 • Economical Custom Construction - Sturdy, professional appearing custom equipment housing made from readily available materials, using woodworking tools and techniques. W4WKM 33 • Avoid Precise Inaccuracy. K5JKX/6 37 • Wayout Measurements - with close at hand equipment or you to can be standard. Henry 41 • On Soldering. K3HNP 43 • Two Meter Transceiver.

WA2INM 45 • Capacitor Substitution Box. W6AOI 50 • Antenna - Simple, inexpensive, small, quick. K5JKX/6 52 • 73 Tests the Knight R-55 Receiver. W3UZN 58 • RTTY in the United Kingdom. G2UK 62 • Propagation Charts.

K2IGY 64 • 73 Reviews the QX-535 Receiver. K3KMO 66 January 1962 (#16) • Kilowatt Sideband Transceiver - Single band rig, but amazingly compact.

W6JAT 8 • Rotate That Tower - Instead of just the antenna. K2LZF 14 • 73 Tests the Alco GDO - It works fine. W4WKM 18 • Rotors - Why TV rotors usually fail as beam twirlers. K2TKN 20 • Speakers for Command Sets - Making use of midget speakers for built-in sound on the ARC-5 receivers. W4WKM 24 • Chase That Dampness - Cure the number one blight to good radio equipment. K4ZGM 28 • Transistor Analyzer - Sure cure for unmarked transistors. Also checks out marked ones.

W6EUM 32 • Simplified Break-In - As applied to the Heath Apache. W4HBO/2 36 • Amateur Moonbounce on 1296 - More discuss ion, not much action yet. W6MMU 40 • Stabilizing Mobile Oscillators - Zener diodes again. W6FIR 46 • Hanky Box - BC receiver, 45 watt transmitter and converter combo for the car.

W3GSC 50 • Eye-Catching QSLs - What kind of bum doesn't have any QSL cards? W2AAA 54 • Investigating the 2NI69A - Like to have some fun? Give this a try. K6BIJ 57 • Propagation Charts - What time to where, when on what bands, maybe. Sunspot chart. K2IGY 58 • QRN - How to track down noise sources. WA6IVM 62 • Save Your Screen Grids - For class-C amplifiers.

No relays involved. W9IHT 68 • Ham TV - Get on the air for under $50! This makes you read our new book. W0KYQ 72 • Calibrating the BC-221 - Uncalibrated 221's are a lot cheaper and aren't difficult to calibrate. Henry 78 • A Sensible Attitude - There is such a thing as too much, even with ham radio. For some people.

K2ENU 80 • Pole Pig Picking - There's a lot of meat in those bones. How to find and choose a pole transformer. K2LZF 86 February 1962 (#17) • V-Loop Beam - Angie claims this thing works out. Looks easy to build, give it a try. W2NQS 8 • Final Tanks - It's about time someone did a through job on this subject. Technical article.

W6JAT 12 • Converting 6 Volt Radios to 12 Volts - Basic conversion for car radios, Motorola, and link transceivers, etc. W4OHM 20 • RX for the RTTY Bug - Nice TT converter, complete with scope. W0RQF 26 • A Page from a Designer's Notebook - Heising modulator design. W5SUC 28 • Sideband the Easy Way - Using the Wes Schum 10A exciter to drive almost anything you have on hand. W9EGQ 30 • The BC221 as an Accurate Audio Generator - How to generate precise audio frequencies with the 221. W0OKH 35 • Which Way is Up? - Proof positive: we'll print anything.

K6EAW 36 • Silicon Rectifiers, Continued - By the time we through you will be au expert on silicon diodes. WA6QFD 38 • 73 Tests the LW-51 - And makes L-W Labs very, very happy.

W3UZN 42 • Surplus Frequency Synthesizer - Incredible surplus buy for people who want to get their feet wet up to here in hamming. W4WKM 44 • Convert the URC-4 - Cute little surplus Handi-Talkie which hits 2M and 220 MHz.

K7ILP 50 • Continuity and Power Transformer Checker - This little test set is really invaluable around the shack. W5EHC 52 • Modifications of the HE-35 - No matter how good a rig is there is always some joker who wants to change it.

WA2INM 54 • Dress it Up - It doesn't take much extra effort to make it look nice. Here's some ideas. W4WKM 59 • PNP-NPN CPO - We have to print a code practice oscillator now and then, don't we? K6EAW 62 • 32 on 2 - Sneaky way to work two directions at once. K8ERV 68 • Propagation Charts - When the bands will open to where, probably.

K2IGY 72 • Economical Antenna Tower - 30 foot tilt-over which home-brews for about 0.012 kilobucks. 74 March 1962 (#18) • Printed Circuit VFO - Extreme stability and simplicity of construction in this 50 MHz VFO may bug you to build. W5UB 6 • Regulated Bias Supply - Great for linears, develops -20 to -120V @ 0-70 mA and presents only 6 ohms to grid.

W5IUR 12 • Check Transistors with an Ohmmeter - Here is the simplest test for transistors yet, and it's safe and works. W9QKC 14 • Radar Detector - All you 2,500 MHz SWL's (UNFL's?) will appreciate this mobile receiver. W6JAT 18 • Ham TV Survey - Ham TV is sprouting up all over. This will bring you up to date on its spread.

W0KYQ 22 • Blind Fasteners Aid Construction - Using explosive rivets to hold things together. W4WKM 24 • Half-Wave Transmission Line - This gets around a lot of your antenna problems. W2KPE 26 • 50 MHz, No Crossmodulation - Six meter converter designed for high signal density areas. K6RNQ 28 • Page from a Designer's Notebook - Transistorized carbon mike pre-amps. W5SUC 30 • Brew or Buy?

W4KOC 32 • 500 Watt Linear Amplifier - Not 811A's again? They're cheap! W0RQF 33 • The Strings the Thing - We'll print anything. What a kookie magazine! W7CSD 35 • Nostalgic V-Beam - Think piece. W2RWJ 37 • The Tiny Terminator - 50 ohm 20 watt dummy load built in Canada Dry Cola can.

Too bad if this is not your brand. K5JKX/6 38 • Old Vikings Never Die - Little hints to improve the Viking rigs. Might work on the DX-100 too. W4AWM 40 • 73 Tests the Knight T-60 Transmitter - Here's another rig we can recommend.

80-6 meters, 60 watts, CW-AM. W4WKM 42 • Antenna Protection and Switching Unit - Built outdoors, where it should be. Keeps lightening out.

W5EHC 46 • Is Marconi Like Spaghetti, Daddy? - Saga of the visiting amateurs, as reported from England.

Margolis 50 • Faithful, Long-lasting, Signal Booster - It also works well and is simple to build. W9ZDN 52 • Evolution of the Bug - Historical aspects of this oft used, little mustered device.

W3WRE 54 • Cure that Angry Band - Audio's selectivity with the FL-8 surplus audio filter. W4THU 57 • BCI in Your QSO?- Keeping BC stations out of your receiver. K2DHA 58 • 73 Tests the Viking Ranger II - Johnsen has nicely updated their most popular rig. W4API 61 • High-Level Mixer - You can mix the full output of your exciter to any band you desire. W5EHC 66 • Zero-Beatnick - More fun with transistors. K6BIJ 64 • Modulation - Our big technical article. This will make you an expert.

Staff 70 • Propagation Charts. K2IGY 74 April 1962 (#19) • Six Meter SSB Exciter/Transmitter - Since sideband is going to be the big thing on 6, you'd better start soldering. W5JSN/K8NIC 6 • Field Strength Meter for Ten and Six - Using a midget loaded whip to improve the sensitivity of your F.S.M. W3YZC 9 • Forty Meter ZL Special - As the sunspots go, so go the higher bands.

Try this 40M amplifier. W4AXE 10 • 73 Tests the Poly-Comm 62B - Pollytronics has really done it: Six and two in one li'l package. W4WKM 12 • Ham Radio in Finland - On the spot reporting. OH2YV 18 • Dot Maker - Great for people who are short on dots. W6VAT 20 • An Accurate S-Meter - 'You're 80 over nine here, OM!' K5JKX/6 22 • LCU'S Michigan Long Wire - Interesting 80M antenna. Somebody's always thinking up something new.

W8LCU 24 • Station Control Unit - Contains speaker, transistorized electronic key, break-in circuit, etc. W7AXJ 28 • Universal Antenna - Works on all bands from 160M to 10M and in between too. W6AOI 30 • One Tube Vox - Now you, too, can learn to talk steadily to keep the rig on the air. K8AOE 37 • Quartz Crystal Checking - Wee gadget to check frequency and activity of your quartz chips. W0CGA 38 • Before the Breadboard - Basics of circuit design, simplified. Staff 40 • Transistorized Cathode Modulator - Kilowatt transistorized modulator. Let us know if it works.

K2STV 46 • AGC for the Swan Transceiver - A small improvement for this terrific little SSB transceiver. K6SHC 51 • 160 Meter Mickey Mouse - 18 watt for for 160M. Let's get more activity up there. And more frequencies. K9PAL 52 • Improve Weak Signal RTTY Reception - We may eventually run a new TT converter every month.

This one looks good. W7CJB 54 • Pre-Amp Curve Shaping - Getting a lot more punch out of the crystal mike pre-amp. W5SOT 56 • BC453 Conversion - Makes a fine and inexpensive signal slicer. K6JHJ 58 • Linear Scope Monitor - Linears are hard to adjust sometimes, this sure helps. W0MWJ 62 • FM to AM - Quick conversion for surplus FM gear.

W4WKM 64 • The Band Warmer - Another good idea for use of the KY-65/ARA-26 surplus keyer unit. W0RQF 66 • Propagation Charts. K2IGY 68 • Precision Measurement for the Amateur - Hints of getting lab gear and reconditioning it. W4WKM 72 • W2SKE/MM (Mobile Motel) - Hard learned ideas on fast setting up for travelers. W2SKE 78 • 73 Tests the Heathkit IM-10 VTVM - Nice. W3UZN 81 May 1962 (#20) • Two Meter Tank and Coupler - Part 1 on a marvelous two meter rig. W9DUT 6 • Simple Antenna Mast - 22 feet for $4.00.

K3LTB/5 8 • 6M Double-Sideband AM Transmitter - Uses circuit board. Whole bunch of fellows are getting on with this simple rig. K8AOE, K8MSB 10 • Two'er Modifications - AC/DC power supply, new osc. Applicable to 10'er & 6'er too.

K2ORY 16 • 73 Tests the Telco 201 Converter - This six meter nuvistor converter is amazing. WA2INM 18 • ARC-5 VHF - Inexpensive surplus rig auto-tunes to 6, 2, and 1-1/4 meters. WA2FHC 20 • 73 Tests the Clegg 99'er - Everybody probably already knows that this rig is great.

WA2HVK 22 • 7077 Two Meter Converter - 73 is first again with an application of this new ceramic tube. WA6EWV 24 • Four Layer Devices - Keeping you abreast of fast moving developments in solid state gadgets. K4CPR 30 • A New Broom - Sweep generator for aligning filters and stuff. K6JHJ 32 • All Band Linear - Using four EL-34's (those hi-fi tubes) 300 watts.

W9CJS 34 • FSK Without Relays - Diode keying unit replaces polar relays for the RTTY group. W5QJR 38 • Do Hams Have Fun?

- You'll have fun with this one. W4WQT 40 • Receiver Prices - Original prices and dates on old receivers. Nostalgia, Inflation! W0HKF 46 • The 85 B14 Receiver - This receiver should keep you out of trouble for this month. Bernard 50 • Vacuum Capacitor Traps - Surplus vacuum condenser units for multi-band traps. W4API 60 • Budget VTVM - Easy to build gadget. Get out the soldering iron.

W7INX 62 • Notes on Silicon Rectifiers - We'll have to start a silicon rectifier department soon. K5IPY 66 • 73 Tests the Heath HA-10 Linear - Another Heath rig proves out FB.

K3KMO 68 • Complete Fire Insurance - Or, how to keep your transistors out of the garbage. W6VAT 70 • 73 Tests the Knight RF Z Bridge and Pocket VOM - For $5.85 and $9.95 you sure don't go wrong. WA2INM 74 • 73 Tests the Hallicrafters HT-40K - New kit from Hallicrafters. W3UZN 76 • Propagation Charts - What time to where, when, on what band.

K2IGY 78 • RF Q Multiplier - More fun with the 2N169A. K6BIJ 80 • High Power Antenna Switching Unit - Using one of the ART-13 antenna switching units to good effect. W4WKM 82 • A Cheap, Simple, Plate Modulator - The surplus Command Set MD-7 is cheap and works fine. WA2PGX 86 • Keep Your Key from Crawling - Without bolting it to the table. Pyle 89 June 1962 (#21) • Echo Deluxe - Two meter transmitter with a commercial appearance. W9DUT 6 • The Friendly Frequency - 52.525 MHz. W9YCB 14 • Six and Two Meter Nuvistor Pre-Amplifiers - Pre-amplifiers are easier to build than converters.

K9ARA 16 • Milliwatt RF Power Measurements - For those low power transistor rigs and transceivers. K4UWX 18 • Noise Limiter for the NC-300 - Rate-of-change type limiter. W8IQN 20 • Six Meter Transistor Converter - Runs directly from your 12 volt system. W3HIX 22 • Simple Tuner for Long Waves - Explore these long-forgotten frequencies. K0VQY 24 • A kW/SWR Power Meter - You can leave it in the line if you want. W6VAT 26 • Selectivity Plus - Putting a mechanical filter in the homebrew receiver. W9OFD 30 • Overload Relay - Beats fuses all hollow.

W0OPA 34 • 73 Cent Noise Clipper - A good price. Connects between receiver and headphones. K0WML 36 • Tape Recorder on SSB - Use tape loops for those long, long CQ's. KZ5SW 38 • Phase Inversion - Hi-Fi on the hambands? W4JKL 40 • Electronic Keyer - Cheap, simple and effective. Get cracking!

K3KMO 42 • Pop Box - Now you can generate your own ignition interference. Make friends with the neighbors. K8ERV 44 • Selected Circuits - Looking at the RF Communications Assoc.

Sideband transceiver. W4WKM 46 • Diathermy - If it isn't too late you might grab any available units. W4WKM 50 • 160 Meter Converter - Lots doing down on 160, but maybe your receiver doesn't cover the band. W1OOP 52 • Crystal Control for the DSB-100 - For nets, Novices. W2BZN 54 • Break-In CW with the 20-A - Or any other imitation of the 20-A. K2ISP 58 • 73 Tests the Knight Kit Code Practice Oscillator - Inexpensive and works fine.

WA2INM 56 • Seneca Modulation and Keying - Couple of modifications for Seneca owners. WA2GCF 60 • How is Your Ham Image? - Martin makes some good points. K7NZA 62 • Calibrate Your Antenna System - Getting some mileage out of your SWR meter. K2DHA 64 • The Perfect Setup - Some improvements on overall station setup. K0OFB/2 74 • A Review of the NC-190 and the NC-155 - They're OK.

Staff 69 • Propagation Charts - Goodbye ten meters. K2IGY 78 • A Crystal Diode Noise Generator - Exceptionally handy for tuning up receivers.

Builds in minutes. W5TEV 80 • Receivership - Ray has had his problems.

W2TAM 82 • Values, Etc. - Some basic discussion on parts values. K5JKX 86 July 1962 (#22) • The 420 MHz Band - Inside dope on this interesting band by real expert. W4HHK 6 • Six Meter Nuvistor Converter - Designed to plug in Drake receiver, but will work with anything.

K8NIC/5 12 • VHF Construction - Heed well this article and you may save yourself a lot of misery. WA2INM 14 • The Eico 720 on Six Meters - You just add a separate pi-net coupler and there you are. WA2KTJ 18 • Finding True North - Handy if you are lost in the woods. KH6BW 20 • Modifying the HE-35 - Revisited.

WA2INM 22 • All Band Nuvistor Pre-Selector - This little gadget makes quite a difference. K8AOE 22 • Transistorize that Meter - Making VTVMs out of those VOMs. Henry 26 • Rambunctious Radiations - It's the location that counts, not the antenna. W4KOC 30 • The Windom - Resurrected and placed carefully on a pedestal. W4WXY 34 • The Whistler - Or how to use an island as an antenna. W2SKE 38 • Power Booster - Replace that 6146 with a 6DQ5 and watch the signal increase. K5JKX 42 • The Engineer and the Transistor Radio - Humor.

Rodgers 46 • Vermin Traps and Dragon Eggs - How to keep the bugs out when you are building that rig. W2TBZ 50 • Selectivity Plus - 105 Hz selectivity with a simple audio filter. W6EUM 58 • Propagation Charts - What time to where, in all probability.

K2IGY 62 • An Old Friend in a New Suit - The ARC-5 rides again. W7CSD 64 • Dear Friend - Keeping those Indians on the reservation. K0OFB 66 August 1962 (#23) • Coaxial Line UHF Pre-Amp - 420 MHz Nuvtstor pre-amplifier, pretty important at these frequencies. W9SEK 6 • Improving the CC50 - Blow the dust off and bring it up to date. WA2INM 7 • VHF with RDR - Navy surplus conversion.

Covers 220 MHz band rather well. W2VCG, W2TAM 8 • Six Meter Coaxial Antenna - Not for DX'ing, but it is simple, inexpensive and omnidirectional. W6KVO 12 • The UNI - Code practice oscillator. W2VSP 14 • More on Crystal Oscillators - Part 2 of the crystal oscillator article in September 1961. W6LWE 18 • Of RTTY and Transistors - Attention all RTTY bugs.

W3TUZ 22 • Crystal Ball - Measures crystal activity overtone activity, frequency spotting, etc. K5JKX 28 • Quad Mode Monitor - An ultimate sort of receiver. W9DUT 31 • Mobile Scope - Why not? K9DYS 36 • More Fun from a Receiver - General coveraging ham-band-only receivers. W2LLZ 38 • TT-180 Five-Bander - Transmitter. W2RWJ 42 • Instantaneous Dissipator Tube - Medium power final amplifier with unusual power supply and interesting voltage regulator.

W7CSD 49 • Management Terminology - Ha. W4WKM 54 • CW Man's Monitor - One 6C4 and a simple circuit. W6EUM 56 • T-60 Modifications - Break-in and push-to-talk for the Knight T-60. W4WKM 58 • Panel Markings - Professionalizing homebrew gear. K5JKX 62 • Potato Face - Fiction. Margolis 66 • Mounting the BC-625 - The 522 will never die. WA5MLI 74 • Surplus Coaxial Switch - Motor driven.

W4WKM 76 September 1962 (#24) • Synchronous Detection - A breakthrough article reading signals 40 dB down in the noise. K2TKN 6 • 73 Tests the Maverick Filter - Really picks off those six meter Indians.

WA2INM 10 • What's a Vidicon? - It is the amateur's answer to live TV. W2RWJ 12 • Twin-Cavity Two Meter Filter - It's what's up front that counts. A thinking man's filter. W3TUZ 18 • Treasures From the Junk Yard - Car radios can be easily converted to 110 VAC. W5VOH 22 • Low-Current, Sliding Bias, Modulator - 40 watt transistor modulator.

VE7QL 24 • How's My What? - Ken has a good answer for our June article on 'How's Your Ham Image?' W7IDF 28 • Western Ham - Sense of humor test.

10 points if tears come to your eyes. Rodgers 32 • Improved Grounded Grid Operation - How to make your exciter load into the final about the same as into an antenna.

W6JAT 34 • Rate-of-Change Limiter Revisited - Using crystal diodes in the noise limiter from the April 1961 issue of 73. K5JKX 36 • Quad Mode Monitor - Part 2. All band supermagnificent home built receiver. W9DUT 42 • 73 Tests the Waters Universal Hybrid Coupler - A very compelling article. You'll probably be coupling after you read this. K2CM 54 • Propagation Charts - W6AM complained that we left these out last month. Bet you never noticed.

K2IGY 60 • Full Break-In Keying - You can get along without it, but there is nothing like it. W4MLE 64 • The Frequency Response Argument - It's what's on top that counts. Keep the highs high. W5SUC 68 • Keying Surplus Transmitters - Getting some code speed out of old relay controlled surplus rigs. W4WKM 76 October 1962 (#25) • VHF'ing with the Standard Coil Tuner - The cheapest really hot VHF converter yet published. W4WKM 6 • 50 Watts on 50 MHz in 50 Seconds - Starting with the Heath DX-20.

K9STH 10 • 20 Meter SSB Exciter - Completely transistorized to boot. W5FRC 12 • Four Layer Semi-conductors - Self completing automatic bug and other adventures of these new gadgets. K8AOE 16 • Improved Base Clipper - Eliminates all signals below a given adjustable amplitude. Ives 20 • This May be the Cause of Your Chirp - If you've been chirpy lately. K7MSL 22 • 73 Tries the Irving Preverter - Two and six meter pre-amplifier.

Staff 24 • Tone Modulated Crystal Standard - Standardizes you up to 225 MHz and you don't need a BFO either. W9DUT 26 • Transmitter Design - Big technical article for the month.

Passably interesting or better. K5JKX 30 • Are You Being Lied To, OM? - SWR bridges can be big liars. KZ5SW 42 • How to Scrounge a Deluxe Junkbox - Without having to work for a parts distributor.

K9AAI 44 • The Local Net - 29,560 kHz. Many other groups are using 52.525 MHz FM, etc. W4MLE 50 • Modernizing the VF-1 - Stabilizing this fleet-footed sprinter.

W2RHD 54 • Mobile Whip - Har! Rodgers 60 • Control Circuit for RTTY - Why use ten switches when one will do? Laziness, that's why.

W0PHY 62 • Sirnplescope, Part 2 - Part 1 was back in September 1961. Great gadget. K8AOE 63 • V-Beam - They stand up to the gales remarkably well. G3BID 64 • Metailic Rectifier Circuitry - Sort of a supplement to our article on power supplies in July '61. K9MYZ 66 • Imagination - A call for the trial of new ideas. W4API 70 • On the Use of the Amateur Bands - Someone is always proposing a new division of the bands.

KZ5SW 72 • The AN/ARC-2 - Stop writing in for this conversion, here it is. W4WKM 82 • FM Rejecting Stub - In case you don't like FM birdies in your receiver. W8HOA 90 • Converting the BC-652 - Inexpensive 2-6 MHz surplus receiver. W1MEG 92 November 1962 (#26) • Solid State 1296 MHz Converter - Transistors on 1296? Good grief, what next?

Sensitive too! W3HIX 6 • Deluxe Your Transceiver - The Lafayette HE-35A, for example. S-meter, spotting switch, etc. K6UGT 10 • Junction Cheks - Quick way of making sure the junctions are still good onyour transistors. K2OPI 16 • The Continental Six - Six meters SSB with this low-cost high performance transmitting converter. W1PYM 18 • Build Your Own Mobile Mike - Transistorized mic pre-amplifier for more mobile punch. K5JKX 20 • 73 Tests the Gonset 220 MHz Communicator - Commercial equipment comes to the 220 MHz band!

W4API 24 • In Defense of the Operator - A weak defense is better than no defense at all. W0OBF/2 26 • Catch All - Ha, ha. Rodgers 28 • Of RTTY and Filters - Book length feature. W3TUZ 32 • Premium Tube Replacement Guide - Equating all those four numbered tubes to better known tube numbers. W4WKM 46 • 73 Tests the Lafayette Starflite - Inexpensive all-band rig.

Eighty dollars, ninety watts. W1MEL 50 • Complicating the Simplescope - Modifications and improvements of the Sept.

1961 article. W0OPA 52 • 73 Tests the Heath IM-30 - Transistor analyzer kit for $54.88 really does a good job. W5SJN 58 • Simple Squelch - Squelching that communications receiver used with a VHF converter. K4UWX 60 • Good Old Charlie Queen - Can this be fiction? W1QUE 64 • Spotting Simplified - Getting those 'spot' switches to really do the whole job.

W4MLE 66 • Coax vs. Open Line - Coax doesn't fare so well, we'll warn you.

W9HOV 67 • Inverted Vee-Beam - Works out like a bandit. Replace guy wires with a very effective antenna.

W8DLU 70 • Choke Evaluator - Test equipment for the shack, not the car. Ives 72 • Those Different Diodes - Big technical article. Staff 80 • A Good Five Cent QSO - George fights a losing battle with the lids. W4MLE 90 December 1962 (#27) • Two Meter VFO - Very stable and uses one tube. Dandy bandspread. W6TKA 6 • Modifying the Sixer - For a 50% power increase.

K4ZQQ 9 • Modifying the HE-45 - Improving the modulation & power output meter for this nice rig. WA2INM 10 • The Irving Hiverter 50 - Six meter SSB converter tested at HQ by W1MEL. Staff 12 • Alternators - With mobile SSB coming at us in a rush we will be needing these. K8ERV 16 • 432 MHz Antenna Tuner - Pictorial article. W1TQZ 18 • Auto Analyzer - Not very hammy. Tachometer, dwell angle meter, battery VM, temp.

Henry 20 • Coaxial Baluns - Open wire is the lowest loss, but how do we get from coax to open line? WA2INM 26 • Selectivity Plus - The CW man sometimes goes to great lengths for selectivity. W6EUM 28 • The Heath HR-20 - 73 tests the Heath mobile receiver. W4WKM 36 • AM Oscilloscope Patterns - You've been wondering what your scope was trying to tell you? W0OPA 44 • Briefcase Twins - Complete portable CW station. W2TBZ 50 • The Heath Warrior - Full kilowatt linear amplifier by Heath.

W6EUM 60 • Joe's Other World - Fiction. Margolis 66 • Transistorized Squelch - Squelch is very handy and this circuit is so simple you have no excuse.

W1TUW 74 • The Waters Q-Notch Filter - For the KWM and 758 Collins owners that want something better. K2CM 74 • The R-45/ARR-7 - This is practically a SX-28. Surplus conversion.

W5UOZ 86 • Constant Voltage Power Supply - A real gem is available in some of those old TV sets. W4WKM 92 January 1963 (#28) • Nu 1-1/4 Meter Converter - Three 6CW4 nuvistors in a sensitive 220 MHz converter. WA2INM 6 • RF Controlled Break-In - Automatic send-receive controlled by the key.

W8MQW 8 • NTSC Signal for Ham TV - Ham-TV'ers will want to read this one. K2HQY 10 • 73 Tests the WRL Tech-ceiver - Works fine. Six meter transceiver. Staff 18 • Linear Amplifier - 3-1000Z kilowatt. W6JAT 20 • 73 Reviews the PMR-8 - Fine little mobile receiver by Elmac. W6FNG 26 • Transistorized Audio Frequency Meter - No test bench is complete with a good audio freq meter, is it? W1TUW 28 • Tale of a Dark Night - Introduction to the author.

W3MFA 30 • SSB or AM - Solution: run both. G3BID 32 • Transistorized Mike Adaptor - Pep up weak surplus mikes with this one. W4WKM 34 • Six Band Ground Plane - James claims that it works out just fine.

W6WAW 36 • 75 Meter Transverter - Good mobile band, simple rig and converter for car radio. WA6FPG 40 • 73 Reviews the Knight-Kit T-150 - 80-6M, 150 watts, CW-phone, out of Allied in Chicago. K9PWT 48 • Scopes - Technical article for this issue. Staff 52 • The Heath Cantenna - 73 gets out the can opener. W3UZN 62 February 1963 (#29) • 6M SSB - Pros, cons, and the gear to do it with.

W2NSD 10 • 432 MHz Gallon - Legal now. K2TKN 14 • Mountain Topping for Blood - An old pro doesn't answer ones. K1CLL 20 • Simplified 8JK Beams - The twin-three really puts out a signal. W6WAW 24 • Double Sideband - DSB has some decided advantages, you might as well read this and face it. W3PHL 28 • Crystal Oscillator - How to get the stability required for moonbounce on 1296.

It ain't easy. K2TKN 27 • Stutterless VOX - Help-p-p-ps to p-p-p-rev-v-vent sp-p-p-peach imp-p-p-pediments. W0OPA 37 • Ballast for the NC-300 - Dang things are always blowing out. Transistorized replacement. K6GVB 38 • Modules - Pep talk on ham modulizing. W5WGF 40 • The RK-715B - Great little inexpensive surplus tube bargain.

K6BIJ 44 • The DX-40 with the SB-10 - Sideband for peanuts. K0PGA 50 • How to Build a Junkbox - Take one pile of junk, some boards, nails. Eslick 54 • Mobile Alternators - Converting six volt units to 12 volts, plus general discussion.

W5VOH 56 • 73 Tests the Johnson Messengers - Boy, are they fun! Staff 60 • Station Time Panel - When a ham builds a clock, he really builds a clock. Ives 62 • Remote Antenna Tuning Unit - Particularly valuable for mobile applications. W8HOA 68 • Recipe for Cooked Ham - ZZZzzzzzaaaaaap!

W6NKE 70 • Cartoon - Ha ha, I hope. Or did your sense of humor get shot off in the War? Rogers 72 • A Hidden Lab - Or how to get along with a fussy wife. W3BNS 74 • Like New RAX - Surplus gem. W7IDF 84 • Precision Frequency Standard - Another surplus gem. A real gem too.

W4WKM 88 March 1963 (#30) • Two Meter Pre-Amp - Two nuvistors, built by a perfectionist. W9DUT 8 • Portable Ragchewer - Low-power rig and small receiver. Eminently portable. K6LJY 14 • Infinite Impedance Match - New type of matching system for beams.

W6NAT 20 • QRP Transmitter - 1S4 peanut whistle. W1MEL 22 • Let's Regulate - Voltage regulated power supplies for transistor circuits and filaments. W2RWJ 24 • Amateur TV Transmitter - 432 MHz rig with 832A in final. W0RQF 28 • A Six and Two Portable - Complete bandswitching transceiver. K8KDX/6 32 • Mode Switch for the Eico 720 and 730 - Phone-CW switching system for this popular combination.

W0DSU 38 • Nuvistor RF Pre-Amp - Brings up signals on all of the less expensive receivers. W6SFM 40 • Receiver Buying Guide - Pictures, prices, and basic data on all postwar receivers.

W4WKM 44 • Measure L & C - Using an audio signal generator. K6AI 60 • Surplus Crystal Calibrator - Real good deal.

W4WKM 66 • Plug-In Cans in Amateur Construction - Those surplus cans can he used for a lot of handy building. W4WKM 68 • CW Sidetone Oscillator for SSB Rigs - Most of 'em have no provision for this important function. K6CYG 82 • The Eico 723 - $49.95 60 watt rig. Does a fine job. W3UZN 84 • The New Look in Surplus - A lot of new stuff is hitting the surplus market. W4WKM 90 April 1963 (#31) • Adjustable Regulated Power Supply - Playing around with transistors? Then have: one of these.

W1ISI 8 • Diode Noise Generator - Simple test instrument to tune up converters, receivers and stuff. Thomas 15 • Selected Circuits - Polar relay test set great for the RTTY group. W4WKM 18 • Decibles - What they are, how to use 'em, complete with a monograph.

K1MRK 21 • Vector VFO - Simple, stable oscillator for 80 meters. Great for DX-60 and the like. W7IDF 24 • Wee Birdcage - Restricted space antennas are always of interest. K3LNZ 26 • Protect Your Investment - How to modify your gear without disastering the resale value. W4WKM 30 • A Survey of Mobile Transceivers - There are quite a few. Staff 32 • Cartoon - Ha! Rodgers 49 • Dress Up Home Made Gear - It doesn't really have to look like you made it in the cellar.

W0OPA 50 • Find the Common Ground - Some suggestions which may improve the interest of your contacts. K4ZQR 52 • Controlled Carrier Screen Modulation - Putting it into perspective. K3LNZ 54 • Compact VFO Dial - Using turn counting dials for multi-turn coils, PTOs, etc.

W4WKM 56 • Making Etched Circuit Boards - Full instructions for a not very hard process. W1ISI 58 • Oversight - Simple addition of a choke which keeps DC off your antenna and you off the floor.WA2HYS 62 • All About Sideband - Well, almost all, anyway.

Staff 66 • Junk Box Station - Shows how easy it really is to build up a station out of stuff. W4MLE 70 • The NCX-3 - 73 test report.

W2NSD 78 • Solving the Bird Problem - Plaintive plea for cleaner signals. W5HJV 80 • How Low Can You Go? - Tuning from 10 to 500 kHz.

K4ZGM 82 • High-Efficiency Switching - For that custom final. W4WKM 88 • The SW-240 - 73 test report. W2NSD 90 • Stimulus in the Space Age - Amateur telemetry balloons and all that, ya. W1WQH 92 • Waters Switches - For antenna switching, etc. Coax switches.

K2CM 98 • Inexpensive Coax Connector - Adaptor System - Inexpensive and flexible way of piping small amounts of VHF around. W4WKM 102 • Plot your Skip Zones - Do-it-yourself propagation system. W9QKC 104 • One Ham in a Million! - Well, one in 350,000 anyway. Story about 5X2JKO in Nigeria. K9AMD 106 • What is a Ham? - Permission granted to reprint this in non-ham magazines, etc.

K7GPZ 108 • The Heath HX-30 - Test report submitted by 73 reader on Heath six meter SSB transmitter. W3WTO 112 May 1963 (#32) • Six Meter Transceiver - Cute little five transistor hand-held unit. Parts kit available.

K3NHI 8 • 6DJ8/ECC88 Converter - Six meters down to 14 MHz using really hot front-end tube. WA2HVK 11 • Simple T-R Switch - For the CW man who wants full break-in without TVI. W4MLE 12 • All-Band Linear Kilowatt - Using the new Amperex 8179 you've been reading-about. W2LPC 16 • Reducing Receiver Noise - Read this one, it is really important. Gabus 24 • The Mark IV - Nice six meter rig, 6146 final. K2HQY 30 • Multi-Channel Pre-Amp - Feed several rigs from one mic and preamp.

W9CWG 38 • A Challenge to the Antenna Experimenter Quads: tri-band, five-band, two-three-four element, etc. W4AZK 42 • Panoramic Spectrum Analyzer - Build your own. W0BMW 52 • Shielding the Breadboard - Some ideas on neat breadboarding. W1ISI 58 • Coax Folded Dipole - Broad bands things. W3HJR 62 • Getting into Electronics - It's a good business too.

W6JAT 66 • Selected Circuits - Altec Lansing modular transistorized audio components. W4WKM 71 • Diode Modulators - Big technical article. Staff 74 • 73 Tests the Knight-Kit P2 - A new SWR meter kit.

K6UGT 80 June 1963 (#33) • Instant 220 - The AN/DMQ-2 is a snap to put on 220. W2TQS 8 • More Selectivity for the RT-91/ARC-2 - Great transceiver, covers 40-80. W6BJI 11 • PE-97A?

- 12V in, 250V @ 100 mA out. Just right for Two'er, etc. W4DWU 14 • Bandspreading the BC-348 - Curing one of the few drawbacks of this great surplus receiver.W5EUL 18 • Lazy Man's Coil Evaluator - Nice little piece of test gear you'll want to build. W0QWY 20 • Converting the BC-230 & BC-430 - Inexpensive surplus rig which can easily cover 160-10M. W5EHC 24 • Ecdysiasm - RT45/ARQ-1 demonstrates stripping for fun and profit. W4WKM 30 • A Beginner's Receiver - BC-453 plus converter, product detector, etc. K6JHJ 32 • Power Tuning - Motorizing receivers with surplus drive units.

Ives 40 • Beam Rotor - Putting one of those surplus motors to work. K1SDR 43 • CW Monitor - One transistor ten minute construction job. 73 kit, naturally. WA2WFW 44 • Antenna Relay Unit - Uses BC-442 unit from ARC-5.

W4WKM 46 • Function of the Loading Coil - In mobile antennas. W9GCQ 52 • Propagation Charts - What bands to where, when. Nelson 54 • More Selectivity for the Two'er - Nice rig, but you have to admit that it could use some selectivity. K6CJN 56 • The ART-26 TV Transmitter - Don't forget to subscribe to the ATV Bulletin, $1 per six issues. K6MIO 58 • Special Surplus Section - Thirty-three solid pages of surplus bargains. W2NSD 65 • A Bargain Receiver for 220 - The R-48/TRC-8.

Easy conversion. K3IUV 100 • Three for the ARC - You didn't think we'd pass up some ARC-5 conversions, did you?

W7ATK 102 • The ARC-5's - Did you? W4WKM 104 • Still Another 2 Meter Conversion - ARC-3 transmitter. W4WKM 106 July 1963 (#34) • Sizzling Six - Super sensitive six meter converter. Kit available.

W9DUT 8 • Chemical City TU - One of the best RTTY converters to come along so far. K8IQJ 14 • Low-Ebb in the Sunspot Cycle - 'Humph, that's science fiction' said Tom astoundingly.

K2TKN 17 • Two-Banding the Swan One Bander - Cinch. W8DZH 18 • Six Meter Transmitter - 2E26 output.

Kit available on terrific tuning-indicator. K6GKU 22 • Two Meter Antenna Coupler and SWR Bridge - Very important item for VHF'ers. W6TKA 32 • Field Day - Eimac hams get out for this annual event. W6JAT 28 • Replacement Power Transformer - What to do when caught without a replacement. W5PPE 36 • The Visitor - Parable. W2CRR 38 • Paco GDO - A good little dipper you may have overlooked.

W5SUC 46 • The Cubical Quad - How they work. W4YM 48 • Two-Band VHF Quad - Six and two meters. W6SFM 50 • Putting a Quad Up - With a minimum of money and manpower. K2AAC 58 • Three-Band Three-Element Quad - Now that you know how great quads are, here's how to make one. W9AIW 62 • Propagation - What time to where, maybe. Nelson 65 • Active SSB Modulators - Big technical article.

Guaranteed understandable. Staff 66 • New Look in RF Ammeters - Do-it-yourselfing ammeters. W4WKM 72 • Knight-Kit R-100A - Checking out this inexpensive receiver. W6EUM 76 • Heath Monitor Scope - Long needed product. W4WKM 78 August 1963 (#35) • Dry Cell Rigs - QRP mountaintop special for six meters. K1CLL 8 • Diode Noise Generator - 73 kit. Zener diode voltage regulated job.

K9ONT 15 • Video Modulation - For the ham-TV contingent. W8VCO 16 • Magic T-R - Best Tee-R yet for VHF with no loss of sensitivity. K5JKX 20 • Saturn 6 - Soup up your halo with this tuning method. K5LPE 22 • Utopia Break-In - Hear through your own sending and keep track of the frequency.

W4MLE 24 • Practical Vee-Beam - This is like a small V-beam handbook sort of thing. K1MRK 30 • Coax Cable Losses - Or why serious VHF men use open wire line. K5JKX 36 • The ON5-PA9 Operation - Details on the Verviers Rally. G3BID 38 • RF Wattmeter - Cardboard mailing tube plus lightmeter. Slick.W7CSD 46 • Transmitting Tubes - Specifications on all popular transmitting tubes.

K5JKX 48 • Propagation - What time to when, from where, maybe. Nelson 52 • Power Supply - Tubeless, general purpose. W7OE 54 • Confessions of an Electronic Genius - How to become one. K6UGT 58 • Squelch for the Two'er and Six'er - Nawthin to it. W0TWP 61 • $25 Cheap - Towering up the hard way. W1MEL 62 • Add-O-Circuit - International Crystal rings the bell. W2NSD/1 66 • SWR Meter - More info on using this baffling test equipment.W8JWP 68 • Vertical Antennas - Theory and practice.

W9EGQ 70 • Further on the Windom - Darned good all-band antennax. W3AFM 76 September 1963 (#36) • Cast Iron Balun - Using ferrite core inductors. 73 parts kit available. W4WKM 8 • CW Noise Limiter - Or have you noticed that your noise limiter turns off on CW? W6SFM 10 • Errorless RTTY Converter - Well, almost errorless.

K5JKX 12 • Bourbon S-Meter - As contrasted with the more popular Scotch S-Meters. Parts kit on this. W6TKA 18 • Cartoon - Har de har. Rodgers 20 • Towers - Compendium. K1APA 22 • VHF Receiver - Module type construction, tuner for VHF converters. W0RQF 26 • Heliwhip Tuning - It is kind of foolish not to have your mobile whip tuned. W2IAZ 34 • Propagation - What time to where, maybe.

Nelson 38 • UHF Cavity Design - Maybe you aren't on 6M or up, but you can learn something anyway. K5JKX 40 • Dual Antenna System for Mobile - For multiband operation. The XYL will have a fit. W2IAZ 48 • 73 Tests and HX-20 - Mobile sideband for us paupers.

K6KGS 52 • Variable Inducer - Remote controlled antenna tuning. WB2CQM 56 • AM Quiz - Maybe you need to sit down and read some of our technical articles. W5EHC 60 • Rotten CW - Right. W1GQJ 62 • Monitor Scope - If you haven't bought one, you'd better build one. W5JSN 66 • Q-5'er Reborn - Should never have died. W4WKM 70 • Code Master - Take one phonograph, add ingenuity.

K6OKX 76 • Save that Mil - Efficiency pointers for mobile work. K1JWU 75 October 1963 (#37) • Do-it-Yourself WBFM Transceiver. K5JKX 8 • Why Johnny Ham Can't Hear - (with apologies to Rudolph Flesch). W6VAT 12 • Why Fight Ohm's Law?

K5HPT 16 • Tri-Element Remotely Tuned Yagi. WB2CQM 22 • Rules of Thumb - Or How to Get in the Ballpark and Stay.

W5IUR 28 • Combination Antenna Coupler. W3WPV 30 • The Minute Motor. W3WPV 36 • Filament Transformer Conversion. W5VOH 40 • 144 MHz Nuvistor Converter. W9DUT 44 • The Portable HE-35. W3IKH 50 • Buyer's Guide. Staff 56 • Product Detector.

K5JKX 76 • Mobile Transceiver Construction. K5MWH 78 • A Novel Type High-Capacitance VFO. YU1FR 86 • Radio Astronomy. WA2BWQ 92 • The Big Switch. W4STX 94 • Double Power for CW.

W2EZJ 96 • Panadaptor Converter. K6VNT 98 • Compact Transistor Circuits. Pullman 100 November 1963 (#38) • Another Approach to TVI - Harmonic Reduction.

K5JKX 8 • 432 MHz Converter - Using the Navy surplus CFN-46ADT. W5AJG 16 • The Perfect Match. VE3DGV 24 • SWR/PWR Meters. W2KPE 28 • All-Band Conical Antenna. W5VOH 32 • Tool and Workshop Section. W2RWJ 40 • AC Adaptor.

W5KKB 42 • Come-a-Longs. K4FQU 44 • Of RTTY - And the TUZ terminal unit. W3TUZ 48 • 73 Tests the Hallicrafters SK-140K. W3UZN 62 • The Amateur's Cope Canaveral. K2YIH 64 • Listen, Fellow Radio Amateur.W6SAI 69 • Communicator IV on CW. W9SEK 75 • Propagation Forecast.

Nelson 80 • Premium Tubes, cont. Gardiner 81 • 73 tests the B&W 6100. W2NSD/1 84 • The Battle of the Century. W2AAA 86 • Shocking.

WA2GCF 98 • Slow Scan Vocoder Transmission. W2AOE 100 December 1963 (#39) • Some Guys Make It - And then there's us. K2ORS 6 • QRP Kilowatt. WA4DQS 8 • 50 MHz DSB - A novel approach. Unknown 16 • Six Meter Transceiver.

WA2INM 11 • VHF Contest Special - A dissertation on the use of the Corner Reflector on 144 MHz. K9SGZ 20 • The VR Tube. Lyman 24 • 432 MHz Exciter - From the ARC-27 RF Subassembly. W5AJG 32 • Cartoon. W5IMJ 38 • Sideband Linears. Staff 42 • Barney and the ZDO. Margolis 46 • Antenna Fact and Fiction.

K6CTV 49 • How to Fill a Box. W7CSD 56 • Four Bands with the KWM-1.

K6GHU 60 • 80 Meter Dipole. W6LVT 65 • The Drake 1B. W5VOH 68 • Noise Reducer. W5SOT 72 • Better Results with AM. VE3AZX 76 • An Answer to 'Listen. Fellow Radio Amateur'.

W8COG 82 January 1964 (#40) • Transistorized Receiver - High Quality. W3HKX 18 • Receiver Deceiver. W2RWJ 30 • Let's Keep it Simple. VE2AUB/W5 36 • Going RITTY. W4RWM 39 • Well Grounded. K4ZGM 42 • The Beginning. W1KSZ 52 • How Good is Your Receiver.

WA4EPY 55 • Effective Filtering - Or shut that thing off! W2OZY 58 • Two-Element Phased Array.

W7RTP 60 • Europe on $2000 a Day. W2NSD/1 64 • Heath HW-22 - 40 meter SSB transceiver. WA2TDH 74 • Automobile Gauge Noise Elimination. W2BZN 78 • Do-it-Yourself - almost. W5EUL 84 February 1964 (#41) • Two Meter SSB Rig - employing novel features.WA2IKL 6 • Heath Warrior Tip. W2DOR 12 • Simplified Receiver Design - become an instant expert.

WA2INM 14 • Making an AC Capacitor. K5JKX 23 • Heat Dissipating Tube Shields. K2ENN 24 • More on the Magic TR Switch. K5JKX 23 • Miniture AM Tuner - transistorized broadcast tuner. K6AI 30 • Loud Speakers and Enclosures - for phone. W1JKX 28 • Transistor CW Transmitter - 2 Watt, 7 MHz. W2RHD 36 • Quieting Small Cooling Fans.

Ivess 39 • Unusual Receiver Circuits. W1OOP • A Long Look at Test Equipment. K5JKX 42 • Practical Ground Systems. WA6BSO 52 • BFO.

K1YVB 62 • ZL Special for Forty. Scharpf 64 • RX Audio Probe. W5VOH 66 • Neutralization. K5JKX 68 • Comments on 'Incentive Licensing'. KZ5LC 78 • Still More on 'Incentive Licensing'. W2AOE 80 • Cartoon. Rogers 95 March 1964 (#42) • The Little Punch on VHF.

K5JKX 6 • Transistorized RTTY Converter. W1JJL 14 • Modulation Measurement - the simple way. K5JKX 16 • 144 MHz Transistorized Converter - high performance. W3HIX 18 • Biasing Tubes.

W2BDG 20 • Six Meter Transistor Receiver. W5JSN 22 • Speech Compression for Mobile. W7SMC 28 • Mobile Power Supply.

K6BIJ 30 • Neatness Does Count. WA2BWG 32 • 3/4 Meter TV. K2OPI 35 • Swan Transceiver Modifications - AGC amplifier and AF/RF gain control. W5TOC 36 • Mobile Rig. K5JKX 40 • Transmission Lines - tripe and triva. W5EUL 44 • Modularization.

K5JKX 46 • Transceiving High-Level Mixer. W2KPC 48 • Electronic Filter Capacitor - or, what won't they transistorize next? W2RWJ 53 • More Gain for the SX-140. W2HTN 54 • Rig Hr Is Homebrew, OM.

W5HJV 57 • Superhet or Regen. K6BIJ 58 • Getting Publicity. W4WUQ 60 • More Comments on RM-499 - written on some of the IoAR RM-499 ballots. Staff 62 • Aldabra. VQ9HB 64 • IoAR Tour - Part 2.

W2NSD/1 74 • Outstanding Amateur - An award to W6AEE. Staff 95 April 1964 (#43) • Los Angeles Six Meter Repeater.

K6VWM 6 • 1296 MHz RF Pre-Amp. I1LOV 14 • Our Man in Washington. W2DUD 18 • Under the Noise. W2NSD/1 20 • The Hallicrafter's SR-160 - a readers look. W8GTT 24 • An Armstrong Sweeper. W2EMF 26 • The Man-Key.

WA60HD 28 • IF Spotter. W5WGF 34 • The Naughty Pi-Net - why is misbehaves. K5JKX 38 • 60 Watts on 75. VE1IC 42 • Pushbutton Control. K5JIC 48 • Waveguide Simplified.

K5JKX 52 • New Ones from Old Ones. K5FUP 58 • Voltage Regulation. K5JKX 60 • What Every Amateur Should Know.

W2DUD 72 • The Vertical J - a simple, inexpensive six meter antenna. K5JKX 82 • Propagation Forecast. Nelson 96 May 1964 (#44) • Flying Noise Lock. K2TKN 6 • Matching VHF Antennas.

K5JKX 12 • Where Have Our Bands Gone? W2DUD 16 • The Quad-Quad - for two. W8HHS 20 • Class D Amplifier - introducing a new type of audio circuit for transistors. K5JKX 26 • 12 Volts from 6. K6BIJ 32 • Single Tube Oscillator-Multiplier. K5JKX 34 • SSB, DSB, AM, etc.

K6HJH 36 • Inboard Calibrator for the NCX-3. WB2MAH 42 • Push-to-Talk for the HT-37. W2ZBS 46 • Gardner Modulator Revisited. WA2AKK 50 • Now Hear This, Fellow Amateur. W4ICY 54 • Frequency Standard.

W2YLH 60 • More on the Vertical J. K5JKX 62 • Big Brother and How He Grew - or House or Seven Gables, Ham Version. K4ZJF 64 • Amateur Radio Emergency Service. K7KYG 68 • Correspondence from the Members - Letters we bet you won't see in QST.

Staff 69 • TVI. K6BIJ 76 • Novice Transmitter. K1WXY 78 • H.S.T. XYL-G3NMR 80 • Hobbyist? W1MEG 83 June 1964 (#45) • T-51/ARQ-8: 6 Meter AM and SSB Transmitter. W5AJG 6 • Nickel Cadmium Storage Batterys. W4VGS 14 • ARB Aircraft Receiver.

W1MEG 16 • ARR-1: Adding SSB. W6BHR 18 • TV-10/A: 220 MHz Transverter. W5AJG 20 • ARR-15. W1MEG 24 • R44/ARR-5 Receiver. Ives 26 • Surplus Find. Gardiner 30 • Propagation. Nelson 31 • Really High Gain.

K5JKX 33 • Smaltz for Semiconductors. Kidder 34 • Surplus Circuit Breakers. Pafenberg 39 • IP-69/AlA-2 Panoramic Indicator. W8DMR 40 • Telechrome 1462-A1 XMTR for 220 MHz. W5AJG 47 • T-28/APT-1: 2 Meter AM and SSB XMTR. W5AJG 52 • Correspondence from the Members.

58 • Using 416B and 8058 Tubes on 432 MHz. W5AJG 66 • Regulated Power Supplies. K5JKX 76 • The BC-348. K8ZHZ 88 • TS-118A/AP Wattmeter. W1MEG 123 • Radar Principles - Simplified. Gardiner 125 July 1964 (#46) • The 432'er: Outboard RF Stage. K1CLL 8 • The 432'er: RF Amplifier.

K1CLL 10 • The 432'er: Tuned Trough Line Mixer. K1CLL 14 • The 432'er: Local Oscillator Chain. K1CLL 16 • The 432'er: First Evening of Listening on 432.

K1CLL 20 • The BH-2. K5JKX 22 • 2300 MHz Wavemeter.

K7YJF 26 • VHF Tunable Oscillators. K0CZD 36 • Six Meter VFO. WA6CDO 42 • VHF Yagis from TV Antennas. W6TKA 44 • Semiconductor Schmaltz.

Kidder 50 • The Ever Useful T-Pad. K5JKX 58 • Symmetrical Latching Relays. Ives 62 • ARRL Motives: A Closer Look. W9AIY 68 • Working New Countries via Moonbounee.

OHINL/W6DNG 73 • VHF Buyer's Guide. WA4HWH 78 • Ham's View of the Alaska Earthquake.

KL7CKQ 84 August 1964 (#47) • Two-Band Transistor Transmitter. QZ7BQ 6 • Two Meter Transistor Receiver.

K6TOV 14 • Stripping Transistor Radios. K8YCH 20 • UHF Beacon. W6GGV 22 • Squelch for Transistor Receivers.

Geisler 28 • Those Fragile Transistors. K4CPR 29 • Transistor AM-FM VFO. WA0HQA 30 • Transistor Final for Forty.W0TKX 34 • Minute kW Power Supply. K8IKA 40 • The Signal Helper. W3WJN 44 • Transistorized Receiver. Morgan 46 • Simplified Transistor Biasing. W2HQY 54 • Transistors for Ham Use.

WA4HWH 63 • Vanguard Modifications. K0VQY 64 • Heath SB-300. WA2TDH 66 • Time for a Change. W7ZC 68 • Moonbounce News. W2NSD/1 72 • Correspondence from the Members.

74 • Another Keyer. K9SGZ 76 • Design Hints: Transistors.

K0VQY 82 • Beast for Ten. WA2WYJ 84 • Propagation. Nelson 96 September 1964 (#48) • Linears for the Two'er. K1CLL 6 • Linear for the Sixer. K1CLL 11 • Portable Six Meter Station.

W1OOP 16 • Now That You Ask Me. W7IDF 29 • More on the 6DQ5. K5JKX 32 • SJS Receiver. K5JKX 34 • Another Antenna of Note. W2RWJ 40 • Tuned Line Tank Circuits. WA4EPY 42 • Six the Easy Way.WA9CZQ 50 • Simple Squelch. K5JKX 53 • Souping the TCS.

K7CJJ 54 • Varicap Phase Modulator. W7CSD 56 • Friendly Silicon Rectifiers. W2RWJ 58 • Moonbounce in Switzerland. HB9RF 62 • The Heath SB-400. K1RPB 64 • Save Ten? WA4HWH 66 • SB-10 and the ARC-2. W6PDD 68 • RF Hazard.

W2QCI 70 • How to Raise a Beam. W2RWJ 72 • Power for DC Motors. W4WKM 76 • Gonset Sidewinder.

W2NSD/1 82 • Rubbish Wire Long Sky. K5HVZ 84 • Bagpipes and the Phone Men. W1JKZ 87 • Propagation. Nelson 96 October 1964 (#49) • A Ham In the White House? K3SUK 6 • Compact Full Size 20 Meter Beam. W3PMV 10 • 160 Meter Transmitter.

W4MLE 13 • 432 MHz Pre-Amp. K6MIO 18 • The SJS Receiver, Part 2. K5JKX 26 • The P&H 2-150. K6LOP 30 • The 432'er Transmitter RF Section. K1CLL 32 • The 432'er Modulator. KlCLL 44 • The HP-23 Powers the Swan 100. K6LOP 47 • Modulated Calibration Oscillator.

Ives 48 • Ten'er to Six. K6GKU 51 • Varactor Tripler to 432.

W6ORG 52 • Blow Up That Meter. W1ISI 56 • City Life. WA2WYJ 62 • Crystal Refrigerator. K3HTB 64 • All About Noise Figure. K5JKX 66 • APX-6 to 1290 MHz. I1LOV 76 • IoAR News. WA4PDX 87 • New Amperex Tubes.

WA1CCH 90 • NCL-2000 Linear. W1ALU 92 • Propagation Charts.

Nelson 96 November 1964 (#50) • VHF Log Periodic Beam. VE3AHU 6 • SSB VFO. K9ALD 10 • Color the Grommet Gone. K7IDF 12 • Cartoon.

Rogers 14 • Tuneable Antenna for 432. K1CLL 16 • On the Air on 432. K1CLL 18 • Precision Audio Attenuator. K9QYI 22 • 6 Meter VFO Transmitter. WA2GCF 24 • Sterba Curtain for Two.

W2ZBS 30 • Electrolytic Saver. W0HMK 31 • KWM-2 Voltage Regulator. WA4NXC 33 • 80-40 Vertical. WB2CQM 34 • Transistor AFSK. K9MLD 36 • 2 Meter Mobile. W2CJN 38 • Mobile Phone Patch.

W2LNP 40 • KWM Operating Notes. WA4NXC 44 • SJS, Part 3. K5JKX 46 • UHF Transistor Circuitry.

K1CLL 48 • Mobile Noise Limiter. K0POX 60 • Amateur Radio Operating, FCC Version. W5EHC 62 • Designing Phase Shift Network. K5JKX 66 • The Easy Way.

K3LNZ 68 • Failsafe Power Supply Control. W3CJM 70 • Incremental Tuning for the NCX-3. K2DXO 72 • Lawrence Modification Kit. K1TVD 74 • IoAR: The Amateur Radio Position. W2DUD 76 • SB-33 and MP-10.

W6VAX 79 • Amplidyne 621. K0CER 80 • Return to the Art.

K3DSQ 82 • Heath Applications Series. K8AJD 84 • Kentucky DXpedition. 90 • Propagation. Nelson 96 December 1964 (#51) • SSB Mobile Receiver - Lots of nice ideas in this one. W3ZFJ 6 • Cheap Pair of Socks - Simple linear using inexpensive new tube.

W6NKZ 10 • 28 Volt Supply - 10 amps at 28 volts for $10. K6VNT 12 • Weather Detector - Don't let a tornado suck you up. K5JKX 14 • 14 Elements on 432 - Simple yagi for 70 cm. K1CLL 16 • Miniature Multiband Tuner - Very clever and useful. W6SFM 18 • Bamboo Birdcage - Thanks to G4ZU and the boomless Quad.W6WAW 22 • Going RTTY - Part 2 - Part 1 was in January. W4RWM 24 • Sixer to the N'th - Some small changes for operating convenience. K1GHO 26 • Two'er Talk - These simple changes improve performance significantly.

W8HHS 28 • High-Level Modulation for Ham TV - Series modulator for improved results.W7CSD 30 • That Elusive SWR - Why throw away those watts? By our Paramp author. WA6BSO 32 • Short Folded Dipoles - How about a 33 foot antenna for 80 meters? W6WAW 34 • VFO Construction Techniques - Solid for stability. Like the U.S.S. W4WKM 36 • Two Meter Double Sideband - The Phantom rises again.

W6TKA 40 • When Good Losers Get Together - Non-technical. In fact, funny. WA5EFL 46 • Evaluating Receivers - Just in case you're in the market for a fancy Christmas present. K5JKX 52 • RK 715B on 6 Meters - Old 5D21's never die; they just turn into quarts of RF.

K2ZEL 58 • Testing the Clegg Venus - In case you wondered: it's tremendous. 64 • SSB With the 6N2 - Curious, huh? K5SGP 68 • Unit Power Oscillators - More useful UHF test gear in Bill's inimitable style. KlCLL 78 • Repair That Mike - Fix up that old mike with an inexpensive new cartridge. W4WKM 82 • Heath Tunnel Dipper - A very useful piece of gear.

W3UZN 84 • The Autotransformer - For maximum power supply versatility.W1ISI 96 • Bandpass Coupler Design - Or maybe you like to twiddle knobs. K5JKX 102 January 1965 (#52) • 120 Watts Mobile on Two - With a well-modulated 5894. K5JKX 6 • AM, the Ham and Transistors - It's not too easy to get linear modulation with transistors. Geisler 12 • Diode Controlled Break-In - A very clever scheme for easy clean switching. VE2AUB/W5 16 • Calibration and How to Get It - By one of the greatest hams. K6BJ 22 • Tuned Feeders Forever - Nasty black snake.

W5DWT 24 • Pegboard Panacea - Clean up your messy workshop. K6UGT 27 • Low-Cost GDO - For those of you who don't like transistors. W7CJB 28 • Transistor Amplifier Design - It's not hard at all. K5JKX 30 • Heath Cantenna for UHF - Bet you didn't know that it's good on 432. K6MIO 34 • I'd Like to See - All sorts of clever inventions. W2LLZ 36 • Ham X-Word - Wear out your brain. WA2BWQ 37 • Conelrad, No; EBS, Yes!

- Simple monitor for your local BC station. K3RKX 40 • Automatic Load Control - If you're on SSB, you need ALC. K5JKX 40 • Solid-State Noise Clipper - Simple way to get rid of that racket.

K6MVH 48 • Take Full Advantage of Your Halo - Simple gadget for easier matching. WA2DJU 52 • Is Your Investment Protected? - Insure your expensive gear. K9UTN 56 • Converting the RDZ Receiver - From 400 to 60 cycles. K1VDX 66 • So We Bought a Spiralray - And found a lot of interesting features. WA4EPY 6 • Two'er Linear - To give you more practical information on inexpensive linears.

K1CLL 70 • 40 Watt DC-to-DC Converter - It operates on 6 volts and uses a common transformer. W3UWV 76 • Heath SB-200 - Very nice. WA2TDH 78 • How to Fish for DX - From a ham who ought to know. 5Z4ERR 82 • Propogation - Conditions aren't too bad. Nelson 92 February 1965 (#53) • The Ham and TVI - With clever cartoons by K3SUK. WA6OQP 6 • Coffee Can VXO for Oscar III - Be ready for QSO's to Europe on two.

W7SMC6, W6HEK 10 • Transistor, Hi, Hi - A few interesting notes on Nipponese transistors. K6QKL/ KH6 11 • Multiband Vertical Antenna - A simple high-frequency antenna for hams with space problems. W3UWV 12 • Let's Go Ham TV - The details of getting on the air. K3DSM 18 • Solid-State SSB Power Supply - With same vital information as well as construction details.

W1VIV 24 • Handy Dandy Zeners - An interesting article in spite of the title. W0GJB 28 • Cooling Notes on the 4-1000A - Keep it cool for long life. W6VFR 30 • 120 Watts on Two: Part 2 - The first part of this fine mobile rig was in January. K5JKX, W5PPE 32 • More on That Simple TR Switch - Published in May 63. W4MLE 38 • The Disguised Twist - A V-H beam for 2.

WA6LUM 40 • The Backward-Upside-Down Halo - Unconventional mounting for improved results. WA41NJ 44 • VHF-UHF Mixers - Detectors and mixers using helices, strips and semi-cavs. K1CLL 46 • UHF Signal Generator - A generator for 432 and 1296. K6MIO 52 • Just a Piece of Wire? -For VHF constructors. K5BLF 56 • The Ham and CD Emergencies - Are you doing your share of PS? W5CZ 58 • Brussels International Mobile Rally - See what fun reciprocal licensing can be?

G3BID 62 • The Callbook Game - It doesn't take much imagination to extend this one. WA2TDH 66 • Plate Modulation with Controlled Carrier - Interesting idea from a great 73 booster. W5EHC 68 • Audio Bandpass Filter - Something for the CW ham.

Hansen 70 • Correcting Errors in the 'Errorless RTTY Converter' - Fine title, that. K5JKX 72 • The Swan 350 - A fine new piece of gear. WB6KEH 82 • The Lafayette HE-45B - For inexpensive 6 meter contacts. K3VHK 8 • The SB-33 on AM - The title is self explanatory. W7L1A 9 • Caveat Emptor - Have you sent in your ad this month?

Staff 92 • Propagation - With some thing new. Nelson 96 March 1965 (#54) • Dual VHF Converter - Combination 144/220 MHz Nuvistor converter.

W9DUT 8 • Two-Band Collinear Antenna - For 40 and 15 meters, by George. W7CSD 10 • The Parametric-Transistor Multiplier - A new development in electronics of great interest, no doubt. W6GXN, W6QUD 12 • Improving the Garden City TU - Don't let the title fool you; it's a complete TU, whatever that is. W7CJB 16 • The Ham - Don't miss this one. Illustrated by K3SUK.

Pirolo 22 • Oscar III Orbit Computor - Be ready for the bird to fly. W7SMC/6 20 • Converting the CB-1 to Six Meters - Don't let those old CB rigs go to waste. WA2INM 26 • The Big Bang - A g.g. W4BV 28 • A Better Converter - Six meters, four transistors, two conversions. WA0HQA 32 • Hints for Microwave - To inspire you to get to work.

K7ZFG 34 • A New Power Tube - The 8236 in an AM modulator. The tube is good for SSB, too. W1KSZ 36 • Hybrid 432 MHz Exciter - Get on 3/4 meters with only two tubes and a varactor. W9SEK 38 • 5/8 Wave Vertical for Two - For people who live in backward, vertically polarized areas. K4DJG 42 • Printed Circuits-Almost - An effective method of attractive construction. W3ITO 44 • Scope Pix Trix - Take pictures of your scope traces.

K6UGT 48 • Easy Higher Power - Using the 6146B. K9FWF 50 • AC Transceiver Supply - Our SSB power supply for this month. K4PNJ/4 52 • Understanding Mixers - You won't understand this article. W6BUV 54 • Electronic Antenna Control - Or how to point your beam the way your indicator points, or something. WA4GTA 60 • DC'izing Scope - Just what you've always wanted. K5JKX 62 • The Missing Link - A short discussion of the many troubles that beset our readers. K9AMD 66 • El Toro - Mosley's limited space antenna that you can use anywhere.

W7OE 68 • Heath GR-64 - Every ham should have a general coverage receiver. Here's a good bet. W3UZN 72 • Understanding Schmidt Triggers - If you want to understand Schmidt triggers, this is a good article for you.

You probably don't. K5JKX 74 • Waters Mobile Antenna - As used on the block behemoth. W2NSD/1 79 • UHF Dummy Load - More UHF experimenteringistic gadgetry. K1CLL 82 • Improved Halo Mount - Fine for hams who send their cars to car washes instead of having the XYL do it. K3JZH 84 April 1965 (#55) • Europe on Two?

- Get ready for Oscar III. W7SMC/6 3 • Letter from Gus - Beginning 73's monthly letter from the DX King. W4BPD/AC5H 4 • 1 kW PEP - 811's in a small box. W9EWL/0 6 • 6 Meter Heterodyne VFO Transmitter - A simple, stable, easy-to-build transmitter from Bill.

K1CLL 10 • Kostless Keyer - Well, maybe not kostless, but klose to it. W8MQW 14 • Double Hula - A small new antenna. Looks like a halo, but good for HF. K2ICF/6 16 • Propagation - Looks like an interesting month. Nelson 20 • Special SSB Transceiver Section - All the dope on all the HF SSB transceivers. Staff 22 • IoAR News - What's new with the Institute.

WA4PDX 32 • Versatile Code Monitor - Transistorized with P.C. W8GXU 34 • 432 MHz Noise Generator - So you think your converter has a noise figure of 3 dB? W6GXN 38 • KWS-1 on VHF - It adopts easily for use with transmitting converters. W4API 44 • Amateur, Spare That Meter - And a chuckle with K3SUK.

W8BPY 48 • Transistor RF Power Amplifier Design - This month's technical article is a first in the ham field. WA2DJU 52 • Some Worthwhile Seneca Modifications - To improve its fine performance. K6VNT 56 • Two Meter Low-Noise Transistor Converter - From our European correspondent. Rohde 62 • A Novel AFSK Oscillator - For the VHF RTTY'er. K8ERV 66 • Signal Generator for VHF and UHF - You'll have to turn to page 70 for the real title. K1CLL 70 • Converted Converter - Turn that old converter into a receiver. W3ZFJ 74 • 73 Tests the Galaxy V - And is happy with it.

W2NSD/1 78 • Unusual Philological Diversion - Sometimes known by other names. K2PIJ 80 • Caveat Emptor?

- Send in your ad now. Staff 92 May 1965 (#56) • 432 MHz Converter - Easy-to-build converter to get you on 70 cm. K6MIO 6 • A New Approach to Phasing - Not all SSB transmitters use filters, you know. W8HXA 12 • The Big Bomb - Runs a gentleman's gallon. W0SYK 18 • Two for Two - Some antennas for our western hams.

W6TKA 22 • The Trouble with Fred - A fetching tale illustrated by K3SUK. Margolis 26 • A Versatile Oscilloscope - Every ham needs a scope. This one does a lot, but doesn't cost it. W0OPA 30 • Constant Gain Audio System - Pretty clever.

Pullman 36 • A Cool kW - Another approach to the inexpensive power supply. K5YWJ 38 • Beer Can Cavities - For use on two. Low noise transistor converter included. WA2INM/1 40 • Four-Element Rhombus - Yeah, that's right. K2IRK 44 • Power Decade Resistor - Or is it, 'Decade Power Resistor?'

Lyman 48 • Improve Your GDO - If it suffers from the common GDO maladies. K5JKX 70 • Six Meter Junk Box Station - The title sounds vaguely familiar. K3VLQ 54 • Design of Log Periodic Antennas - A 73 technical scoop. VE3AHU 62 • Gus: Part 1 - This is it: The beginning of Gus' life and DXpeditions.

W4BPD 66 • 73-A-Phone - Yeah, it's a stupid title, but what do you expect from an editor of S-9? K5JKX 70 • The 1215'er - Hoisington sure makes 1200 MHz easy to reach.

K1CLL 72 • Total Boredom - But not to read. W71DF 80 • Oscar III Highlights - What happened.

K0CER 82 • Davco DR-30 - Review of a remarkable new receiver. WA1CCH 86 • Litts Code Snitcher - Code monitor-oscillator. Good to at least 16 wpm. WA6UVS 90 June 1965 (#57) • A VFO With FSK Provisions - A stable VFO for the SSB-RTTY man. W6TKA 18 • Shoulder Strap Portable - An easy-to-build 6 meter rig for portable operation.

K1CLL 22 • Superimposing 6 Meters on Your Tri-Bander - The ideal match for a transmitting converter. W4API 25 • The Waters Cadax - A very fine all-purpose electronic key.

WA2TDH 26 • 73 Tests the Henry 2K Linear - An Imperial Gallon. W2NSD/1 28 • Gus, Part 2 - In which a country boy from South Carolina finds true happiness. W48PD 30 • Interlaced Sync Generator for Ham TV - A reply to the anguished cries for more TV information. WlJJL 34 • Fixed or Mobile - Some notes on hamming for the handicapped. WA9AFI 36 • A Compact DC-to-DC Converter - Especially useful for that one tube in a transistor rig. W6GXN 38 • Oscar Round-Up - Who was worked and who was heard.

K0CER 40 • A Surplus Sleeper - Here's one you may have overlooked. W9SLM 44 • The Kitchen Heat Sink - We try to get the best titles.

W0CGQ 46 • Converting the R-508/ARC - A modern surplus receiver for 118-148 MHz. W4WKM 48 • Using the 416B on 220 MHz - In the CG-50ABM. W5AJG 52 • High-Power with the ART-13 - Souping up an old reliable. K4PFK 56 • Converting the ARC-4 - A versatile 2 meter transceiver with little work. W4WKM 60 • The CV-253/ALR Converter - A useful receiver for 38 to 1000 MHz. W1KSZ 66 • 220 MHz Converter from the ARC-27 - Tunable to get rid of the trash and birdies.

W5AJG 68 • Adding GDO Features to the TS47A/APR - Every VHF-UHF ham needs a GDO. Here's an easy one. W5AJG 74 • A Surplus Gold Mine - More specifically, the R-105A/ARR-15. W4WKM 78 • 432 MHz Pre-Amplifier From the TD2 - Uses a 416B. W5AJG 82 • Fantastic Surplus Catalog Section - Needs no explanation.

Just drool and order. Staff 91 July 1965 (#58) • A Two Meter Transistor Transceiver - To give you a little encouragement to go portable on VHF. I1SLO 6 • A Simple Two Meter Collinear - Build your own CushCraft collinear. W5GVE 14 • 220 Converter Number 9 - The last tube converter Hank built, but a good one. W1OOP 18 • Reviewing the CushCraft Squalo - It works. WA2ZCH 20 • Push-Pull 5763s on 144 - You might call it a forest of 5763s. WA6VTL 24 • 2C39 Amplifier for 1296 MHz - Get yourself a respectable signal on the band.

WA8CHD 26 • A Varactor Tripler to 1296 MHz - The perfect mote for the 2C39 amplifier. W6ORG 30 • The CPO-CWM - Translation: Code Practice Oscillator-CW Monitor.

WlJJL 32 • A VHF Flashback - A few dewy-eyed memories for the old timers. W6SFM 34 • Silver-Plated 417A Converter for Two - Of course, you don't have to silver-plate it. K2KTV 38 • Testing the Galaxy Rejector - A useful accessory for your SSB gear. WA2TDH 41 • 20 WPM - or Bust! - Hints on getting the Extra Class license from an Edison Award Winner. WA6VTL 42 • The Gonset Six Meter Sidewinder - Transistorized sideband on six. Staff 50 • Converting the Swan Monoband to Two - A bargain two meter SSB transceiver.

K9EID 52 • How's Your VHF Antenna Working? - Not the ultimate, but a useful method of checking gain. WA2INM 59 • A Potpourri of VHF Hints - Four short articles that can be applied to VHF and HF. Staff 62 • The Design of VHF Tank Circuits - Don't let the math scare you away; the graphs give the answers. W6GGV 66 • Gus: Part 3 - More hints on DX from the DX King. W4BPD 76 August 1965 (#59) • This One Sounds Good - Like a Transmitter Should - A fancy name for an article about a 20 watt six meter AM transmitter. W2BHT 6 • Going RTTY: Part 3 - The scope monitor.

W4RWM 12 • Imagineering With Meters - Put those miscellaneous meters to good use. W8BPY 14 • The EHS Portable Dipole - Works from 80 to 6.

W9FQN 16 • Some Notes on Grounded-Grid Linear Amplifiers - And some interesting ideas in a 8072 linear. K4ZZV 18 • Simplified Solid-State - Simple, easy-to-use, practical ham transistor circuits.

WA2INM/1 24 • All-Band Tuning for the Drake 28? - Easier and harder than you think. K9LTD 26 • When Standard Switches Won't Fit - Making and using odd-ball switching arrangements. Ives 28 • A CHU Time Receiver - In case you don't have a watch. W2LYH 30 • Switching with Diodes - It's easy-and very useful. K1SDX 3 • Improving the Paco GDO - And other tube-type grid dip meters.

K1AMN 41 • Another Way to Measure Noise Figure - Hmmm. What's the other way. K5JKX 44 • The Big Sail - The neighborscaring-ist 432 MHz antenna you'll ever see. K6MIO 50 • Gus: Part 4 - Now what's he up to?

W4BPD 62 • The SB-34 - Sideband Engineers improves their already excellent SB-33. W8QUR 68 • A DC Dummy Load - Here's a use for those tubes you were going to use for lamp bases. Lyman 70 • Quick and Easy Add-on Neutralization - In case, unlike most hams, you don't plan ahead.

K1CLL 72 • Polar Versus Solar Beam Orientation - Personally, I use my Boy Scout compass. W6TAQ 7 • Parallel Resistance Nomogram - Now all you have to do is find this article when you need it. WA2BWQ 76 • An RF Amplifier for 432 - Not exactly a 3 dB noise figure, but.

K1CLL 7 • The National HRO-500 - Sigh. W2NSD 80 September 1965 (#60) • Der Kleiner Keyer.

WB2KPE 6 • QRM on 432! W2NSD/KP4 14 • Practical Meteor Scatter. K1CER 20 • A Simple DX Antenna. W6WAW 24 • The Ultimate in Transmitter Control. WB2CCM 28 • DSB Circuits.

W6TKA 34 • The Zorch-Proof Connector. W4WKM 36 • An One Filament Transformer Bridge. W5NGX 38 • The Cheap SWR Bridge. WIJJL 42 • Simplified Tuning for the Drake 2B. W7ZC 44 • W2NSD in Hungary.

W2NSD 46 • Two Meter Transmitting Converter. K1CLL 50 • Why Use Fuses? W4WKM 52 • Writing for 73. W2NSD 54 • A Gold-Award SOS. W2AAA 56 • Gus: Part 5. W4BPD 66 • The Heath Ham Scan. WA2TDH 70 • The Sub-Antenna.

W8ADV 72 • Passivating Aluminum Alloys. Kidder 74 • A Surplus SWR-Power Meter. K9SOA 82 • An UHF Signal Source. K1CLL 84 • Light Bulbs for Dummy Loads. W8QUR 86 • VFO Stability. W6BUV 88 • Low-Cost 6-10 Mobile Antenna.

W3GSC 94 • How to Screen Modulate. K5JKX 96 • Surplus Switching.

W4WKM 104 • The Evolution of a Transistor Transmitter. W6WFH 106 • Build or Buy? W7OE 114 • Let's Go Up or Down.

W8VVD 118 October 1965 (#61) • 2 kW Mobile - PEP, of course. W2DMK 6 • Meterama - Get some good use from those old air-speed indicators. W5GWF 12 • Six for Six - Six elements for six meters. WB2CQM 18 • A State-of-the-Art Converter - Integrated circuitry comes to hamdom.

W3HIX 22 • Hamfest Out on a Limb - A little step toward international hamming. Margolis 26 • Are 20 Cent Transistors Coming? - Apparently so.

W7SMC 30 • The Lowly Coax Fitting - A little picture article. W5VOH 34 • An Expedition to UJ8 - 20,000 feet up. UB5UG 38 • A Junk Box Power-SWR Meter - In case you missed the two SWR meters last month. K4QYC 44 • The Design Industries Diplomat - A fantastic new piece of gear. W2NSD 48 • A Ham Crossword Puzzle - Unfortunately, we didn't have room for the solution. K1CLM 50 • Two Meter Transistor Transmitter - Get two watts out of a 2N107 on two.

K1CLL 54 • A Reliable Audio Source - A 7 lb generator that works as well as a two ounce transistor one. Ives 62 • Improving the Heath Mohawk - Pepping up the RF and audio. W9ECQ 68 • Gus: Part 6 - Gus in Prague.

W4BDP 76 • The National NCX-5 - An amazing rig. W5DWT 84 • Testing the Heath kW Kompact - The Little Bomb. WB6KEH 88 • Improve your Monoband Swan - For better stability and class C. K6LGW 90 • That Unwanted Sideband - Another in the 73 Sideband Series. K5JKX 92 • DC Transformers - Need 28 volts in your car? W6ANU 102 • Getting the Most from Your Two'er - A few more changes for one of the most popular pieces of ham gear. WA2QZH 111 November 1965 (#62) • We Got Across!

- Catching up with the past: No.3. W2AAA 6 • An Audio-TV Transmitter - Broadcast sound and video on the same carrier. W8VCO 14 • Hybrid Phone Patch - Of course, we don't really approve of phone patches. KH6IJ 18 • A Coax Antenna for Twenty - Or fifteen or ten. W2NQS 20 • Six Solid Watts an 160 - We keep telling you that tubes are obsolete. K9IAH 22 • Half-Rack Panels - Sure beats those orange crates for mounting. W2DXH 26 • A Novel ALC Circuit - Why didn't someone think of this before?

W2KAK 30 • The Nuvistatectar - Clever product detector for your old receiver. K9EID 32 • Transistors for Hams - Which inexpensive transistor to use where. WA6BSO 34 • The Flex Match - Perfect for feeding a coathanger. W3ZVT 38 • Adding ALC to the Swan 240 - There are lots of old 240s around. K5JKX 40 • A TV Converter - Use your TV camera with a normal TV set. W9SEK 44 • Crystal-Controlled Transmit With the KWM-2 - Works with other transceivers, too.

HB9TL 46 • Lovers Lane - Hmmm. Drawings by K3SUK. Lattak 48 • A Modern Frequency Standard - Not expensive or complicated, either.

W5NUW 50 • The Baffling Totem - Keep the kids out of your shack. W7PXE 54 • 432 Solid-State Local Oscillator - A more modern LO for the 432'er. K1CLL 56 • Six Meter Transmitting Converter - Twenty in, six out.

K0AHD 62 • The VHF Newcomer - Our VHF editor gives you a few hints. K0CER 66 • Gus, Part 7 - What happens when a South Carolina Baptist visits the Vatican?

W4BPD 70 • The Heath SB-110 - Single sideband on six to match the SB-Line. WA1CCH 78 • Transcam's SBT-3 - There are a lot of interesting ideas in this one. W2NSD 86 • Evolution of an Antenna Tower, Florida Style - How about a 70 ft. Telephone pole in your yard? K4FQU 88 • Slippery Six - A VFO-heterodyne battery rig for six.

K1CLL 94 • A Light Wattmeter - Trying to improve an old idea. Henry 98 • VFO Control of SSB Receivers. W0CGA 110 December 1965 (#63) • Solid-State 432 Exciter - Puts out 8 watts on 432 MHz. W9SEK 6 • 8058 Nuvistor Preamp for 432 MHz - Complete plans and layouts. I1L0V 10 • UHF-VHF Dipper - 50 to 500 MHz with no work. WA1CCH 11 • Transistorized FSM - Printed circuit board available for this one. W1JJL 14 • Ham Christmas Gifts - Ho, ho, ho!

It's that time again. 16 • RF Measurements - Build a Q-meter and impedance bridge. K5JKX 20 • A New Two Meter Heterodyne Exciter - Use a suppresser balanced mixer to get on two. WA2JAM 28 • Licensing in the Belgian Rallies - A report on the 1964 rallies. G3BID 24 • A Regulated Solid-State Supply - Here's the supply for the 432 exciter on page 6.

W9SEK 34 • Transistor Twenty - A tunable twenty meter converter. Scott 38 • Frame Your Awards - A few hints on showing off your prizes. W7OE 40 • Lazy Man's Phone CQ'er - A voice controlled relay. WA2MTB 42 • The 1215 Transistor Superhet - Part 1; The Mixer. K1CLL 46 • The Solid-State Slippery Six - A transistorized heterodyne VFO.

K1CLL 50 • A Crystal Controlled Front-End - Put that old pre-selector to work. K1QIM 52 • Field Effect Transistor Primer - Another ham scoop. FET's are mighty useful. WA6BSO 54 • A Doll for Serifina - Reminiscences of an old ship sparks.

W7IDF 66 • Build a 4-1000A Socket - The tubes can be cheap, but the sockets! W7CSD 70 • An Audio Frequency Standard - Transistorized, of course. K8ERV 72 • A Bumper Mount for 'Impossible' Cars - If one won't do it, why not use two? W7SMC 78 • Gus, Part 8 - Gus descends on Lebanon, Egypt and the Seychelles. W4BPD, etc 84 • Two Through Twenty Field Strength Meter - Tunable and transistorized, too.

W7OE 9 • A Low-Power Standby Transmitter - AM on HF? W7CSD 104 • The Full-Wave Tripler Myth - We don't like to rush things. W6LWE 100 • The Three-in-One Birdcage Beam - For 10, 15, and 20. ZS3NZ 110 January 1966 (#64) • The Space Monitor - Now, here's a real construction project. W9DUT, W9JFW 6 • A Unijunction Keyer - Build a modern keyer for less than $20. WA6TSA 12 • Two-Element 20m Vertical Array - Get 3 dB gain and 15 dB front-to-back ratio.

W6TKA 16 • They Said It Couldn't Be Done - What? A female build a rig?

WA2YTK 18 • Simplified RF Measurements - Measure impedance and power easily. WA6BSO 20 • A Six Meter Peanut Whistle - Every ham wants a walkie-talkie; here's Larry's. WA2INM 24 • A Visit to the CN8s - Edgar tells a little about his trip. G3BID 28 • The Pot Box - Any experimenter needs one. K6UGT 32 • A RTTY Signal Generator - Good for SSB and AM, too. W8GXU 34 • This is Fine Day - The first intercontinental ham QSO. W2AAA 38 • Transistor Meter Amplifiers - Need a 10 microammeter?

WA6BSO 44 • The Twixer - Add six meters to your Two'er. W0HMG 46 • A Line About Line Noise - Maybe that power blackout was caused by a mad ham. W4NJF 50 • Assembling the Sideband System - The conclusion of our SSB series.

K5JKX 54 • Gus: Part 9 - Agalega, Here I Come! W4BPD 6 • Build the OTC - A one transistor converter for VHF. WA4SAM 74 • The Eico 753K - Eico's really scooped with this one. W3KET, W3TND 76 • The Drake R-4 Receiver - A very versatile receiver for your money. WA2TDR 78 • 73 Tests the Knight C-577 - Audio compression works.

WA1CCH 8O • VFO Stability, Part 2 - Transistors are better than tubes. W1KNI 82 • 73 Tests the Coveya 6 - Heh, heh. The neighbors don't know it's for six. WA1CCH 84 • Twelve cm Heathscope - It's the Heath IO-12. W7IDF 86 • The 1215 Transistor Superhet - Part 2, the local and other oscillators.

K1CLL 90 • Vibrator Checker - It's a stupid subject, if I say so myself. WA1CCH 95 • Low-Noise UHF Transistors - Don't read this if you're a tube man. It'll make you cry. W1OOP 96 • IoAR News - News from the new IoAR Secretary. 98 • What's Your Mobile Strength?

- Simple FSM adapter for your car antenna. W9NTP 102 • Why Instruction Books? - Why indeed?

W70E 10 • Improve the NF of Old Receivers - Soup up the ol' hearin' aid. WA4EPY 108 February 1966 (#65) • An 8163 Linear - An all-band 2 kW linear. W6OVW 6 • And Then There's Phasing SSB - Discussion and a simple practical exciter.

WA6KLL 10 • Better Selectivity for Your Transceiver - CW selectivity makes CW operation easier. Roanhaus 16 • A Crystal-Controlled Front-End - Stable high-frequency reception on your old receiver. W1QIM 20 • The Key to Peaceful Coexistance - Between six meters and channel two. K6MVH 22 • Breadboarding - Excellent discussion of experimenting. W2DXH 24 • Noise Considerations in a Pre-Amplifier - Necessary information for UHF hams. WB2EGZ 28 • Transistor Receiver-VU Style - Scrounging wins!

VU2NR 30 • The Astro Ten - Simple ten meter transmitter-converter for mobiling. W3YZC, W3IXL 34 • Improving RTTY Reception - Good hints for the teletype fan. W4EHU 38 • Quick and Easy Bias Supplies - Steal a little bias without fuss. K5JKX 42 • A Word About Crystals - And not on encouraging one, eitheri.

K0JXO 44 • The Design of Parabolic Reflectors - Now, how do you make them? K3PBY 46 • Transistor CW Adapter - Especially for the SB-33. W5JSN 50 • Give and Take - History of international radio conferences.

W2AAA 52 • The Zero Meter Band - A bit of fine fantasy. WA2TDH 58 • Automatic Tuning for the ARC-5 - This one's a real thriller. W4WKM 62 • Boasting Talk Power - In ALC type transmitters. K2IKZ 64 • Seeing Your SWR - Clever scheme for antenna work. K5JKX 66 • The 1215 Superhet, Part 3 - The final article: if, of and assembly.

K1CLL 74 • Put Your SB-33 on CW - A scheme totally unlike that on page 50. WA6PGA 78 • 73 Tests the Tunaverter - A quick look at a tunable transistor converter. WA1CCH 80 • How to Be a First Class Lid an Phone - Without really trying. WA5DEL 82 • Some Ideas on Noise-Free CW Reception - Why listen to all that trash? K4DAD 8 • The Crystal Decade - Full frequency coverage with crystals. W4ATE 90 • Hero of Ham Bands - Deke put Nokomis on the map.

K9AMD 96 • Amateur Frequencies - Wonder where forty went? Schmeling 98 • Semi-Modernizing Vibrator Power Supplies - Get more power from those old Vibrapacks. W6TKA 102 • Use Your GDO and Z-Meter - They're very useful, as this article indicates. W0BMW 104 • The Care of Storage Batteries - At least lead-acid types.

W5SOT 108 March 1966 (#66) • Circular Polarization - Use CP for moonbounce, trop, and OSCAR. K6MIO 6 • Solid-Stale Sixty - A 60 watt regulated power supply for and with semiconductors.

K3LCU 12 • Crystal Oscillators - Tube, transistor and FET. His is a good one. W6GXN 14 • Slaying the Monster - Or: Why fear TV? W0EDO 18 • Diary of a DXpedition: VP2VD - So you think it's just a matter of sitting by the pool and operating? K4IIF 20 • Unmodifying the S-38 - Have you ever met a ham who hasn't had a S-38-once? WA5MCU 26 • Vector Vector - Vector boards are sure useful.

W2DXH 28 • Cathkey - Is this the simplest automatic keyer? K2UOC 32 • All Solid-State - Another interesting one from one of (y)our favorite authors. W1OOP 34 • QSL Here is Homebrew, OM - Homebrew QSLs? WA2ZKR 36 • The 88 Cent Varactor - Who says they're all expensive? WA6BSO 38 • 12 Volt Beetle Juice - Even the Fastbacks are 6 volts. DJ2UL 48 • The HD-10 - Heath's new electronic keyer. W2JDL 50 • Solder and Soldering - Make your soldering stick.

K4CPR 52 • The Rhombic Antenna - A round-up of information on these almost-legendary antennas. W0SII 54 • The Vacap Tester - Here's a tester that sings at you. W0BMW 60 • The Feedline Argument - A little more fuel for it. W0OPA 66 • Letter from Jail - Stuffy readers: skip this.

W6GTC/jail 70 • Improving the HX-20, HR-20 and HP-20 - Who could improve on this title? K0LFA 74 • The Walky-Nosy - A portable emergency communications receiver. K6EDX 78 • Our Friend, the R.I. - Maybe a little more appreciation of the FCC is called for. W7IDF 82 • Those Good Old Ham Bands - They're getting mighty thin.

W7ZC 88 • Low-Pass Audio Filters - The full story, he says. K5JKX 90 • Gus, Part 10 - I think I'll take a plane and leave the bus to Gus. W4BPD 98 April 1966 (#67) • Barefoot and All That Jazz. W7IDF 6 • A Simple Six and Two Amplifier. K1CLL 8 • That Pretty Anodizing.

W8BPY 12 • The Bee Eliminator. W8VVD 14 • The Six Meter Jewel. K3PXT 16 • The Ascendency Curve Yagi. K6EDX 20 • The Uhfit. WA1CCH 26 • Six to Two Transmitting Mixer. K9EID 40 • A Slotted Line for 1250 MHz. WA8CHD 42 • A Short Look at Current Propagation.

Nelson 46 • Diddleboxes. W2DXH 48 • Modernizing a 432 MHz Converter. W1OOP 54 • Power Control Through Magnetic Beaming. W2OLU 58 • A Look at Antennas for DX. K6ZGQ 68 • Someone Should Do Something About. K3BNS 74 • The Tranx Circuit.

K7VMV 76 • A Semi-Switchless Directional Coupler. VE2HE 80 • Two Buck Monitor. WA6KLL 82 • Controlled Audio AVC System.

EI4R 84 • One-Way Dual Battery. WA0AIY 86 • Multi-Channel Transistored Pre-Amp.

K9SGZ 100 • Ferrite DF. W1DFS 101 • Gus: Part 11. W4BPD 102 • Built-In Speaker for the TR-3.

K5SGP 112 • Diode Checker. K8ABR 112 May 1966 (#68) • New VHF Circuits for Transistors - 6 meter converter and filter from Frank Jones. W6AJF 6 • RF Applications of N-Channel FETs - Very important article; a 73 scoop, of course. WA5KLY 12 • Size is Impressive - A little humor to brighten the day. K3VMZ 14 • FSK Principles - How to transmit RTTY on HF. W4EHU 16 • VHF-UHF Panoramic Reception - Now you can watch that empty band.

W5NPD 20 • UHF Grid Dipper - Excellent dipper, even if it does use tubes. WA6BSO 24 • PY2USA - Fostering good relations through ham radio. PY2CUB 32 • W2USA/TV - Good publicity for hamming at the '39 World's Fair. W4DKJ 34 • 12 Volts on 6 Meters - Ed doesn't like semiconductors, I guess. K8ADG 38 • 432 the Easy Way - Cheep, too. WB2FYB 40 • Dealing with the Information Explosion - In a blood thirsty way. W2DXH 42 • Regulated DC-to-DC Converter - Put in 6 to 24 volts and get out 12!

W6GXN 46 • How Much Capacitance for that SSB rig? - Beat the high cost of microfarads. W4VRV 50 • The Mini-Supply - A simple, inexpensive regulated power supply. WA6BSO 54 • Origin of the Code - An interesting sketch of history. W2AAA 58 • Understanding AVC - A very thorough article. K5JKX 66 • Why Work the World Now?

- Complete rules of 73's new WTW DX certificate. W4BPD 78 • A Private Listening Speaker - For mobiling. K5BEC 80 • A Solid-State Product Detector - The semiconductor answer to pentagrid mixers. W6GXN 84 • HW-22 on CW - Takes about 10 minutes, too. W7UXP 88 • Transistor Power Supply - Simple, quick and cheap. WA2TOV 90 • Ham with a Heart - K7SML, a multiple sclerosis victim.

K7NZA 92 • Fuses - What fuse to use where. W9ZZH 95 • Confession - A SF thriller. W0HMK 96 • Low-Voltage Gonset Super Six - Throw away that HV power supply.

W0BMW 100 • HX-50 on MARS - Very simple procedure. K9CZI 104 • Improving Der Kleiner Keyer - A few correct ions and improvements. W4BRS 106 • More Contacts from Within - Simple indoor antennas for high frequency use. K3RXK 108 • For Those Who Have Given Up Code - Encouragement for novices and technicians. WA8BJK 110 June 1966 (#69) • The Micro-Ultimatic - 73 scoop: integrated circuits in a high-performance keyer.

W1CFW 6 • A Transistorized Scope - Another ham scoop: use transistors for deflection amplifiers. K8ERV 14 • 50 Watts on 50 MHz for $50 - This project should prove popular. K1CLL 18 • Two Meter Transistor Converter - Cheap, simple and works well. W6AJF 24 • 220 MHz Transistor Converter - Grounded emitter or grounded base, too.

W6AJF 30 • 432 MHz Transistor Converter - Four 50 cent transistors give you a 4 dB converter. W6AJF 34 • Standard Time and Frequency Transmissions - What time did you say it was? W6JTT 38 • A Simple Two-Tone Test Generator - Find out your true power output in PEP.WA6BSO 42 • BC-348 Crystal Filter - Improve the filter in your BC-348.

K2ZZF 46 • APA-2 Pre-Amp for Two - Of course, a transistor works better, but. W5LTR 48 • Modernizing an SCR-522 - That's what I need, a modern SCR-522.

WA6BSO 50 • The First and Last Q-5'er - A little history of command sets. White 60 • The Stoner RT-1 RTTY Converter - A transistorized RTTY receiving adapter. WA6BSO 64 • Five-Band RDZ - Marry a RDZ to a standard coil tuner.

K3HIL 66 • Gus: Part 12 - See where our South Carolina boy is now. W4BPD 68 • Surplus Conversion Guide - Find out where to find that conversion. WA1CCH 74 • 220 MHz Receiver from the ARC-27 - A good use for the guard receiver. K3CES 78 • BC-453 Series Receivers - The simplest conversion. K1EUJ 82 • Do You Want a Lawsuit? - $100,000 is a lot.

W7OE 96 July 1966 (#70) • MARS HF Mixer and Amplifiers - Also good for putting your tri-band rig on 15 or 10. WA4KIH 6 • Two-Element Weeping Willow for 15 - Perfect for novice DX'ers.

WA8MVR 12 • Frequency Measurements for Hams - Receives VLF, too. W6BLZ 14 • VHF Parametric Transistor Multiplier - Experimenters must read this one.

A scoop, of course. W6GXN 20 • How to Get Your Extra Class License - Here's the easiest way to do it. W5TOM 26 • A Transistor Analyzer Using FETs - It checks h11, h12, h21, and h22. K3LCV 30 • A Field Effect Voltmeter - Here's a real transistorized VTVM: 22M input resistance. K3LCV 34 • An FET Audio Compressor - Use FET's for high input impedance. K3VNR 38 • The Kindly Keyer - This IC keyer uses a commercial PC board.

WB6AIG 46 • Save That Transistor! - Defective transistors as Zeners and varactors? K9VXL 50 • Lambda Lines - Scraps of twinlead a make good Lecher lines. W2DXH 54 • Designing Transistor RF Amplifiers - Good info for the serious experimenter. Thorpe 58 • A 75 Watt Two'er Linear - It uses Bill's favorite Compactron. K1CLL 66 • A Better Sideswiper for Electronic Keyers - Your cat will like this one.

W6BLZ 70 • Replace Your 811s with 572Bs - The right way. WB2EPG 72 • UB5UG's Five-Band Vertical - It's pretty clever, and simple, too.

W8FAZ 74 • Don Miller DXploring - The life of leisure on a lush tropical island. W9WNV 76 • Gus: Part 13 - Gus keeps rolling along. W4BPD 78 August 1966 (#71) • More Power on Six - Drive this linear with your AM or SSB exciter. WA9JGU 6 • James Dandy Mixer - A very simple, yet useful, test instrument. W2DXH 12 • A Poor Man's 220 Transmitter - It puts out half a watt; good for local work. WB2EGZ 14 • Another Solid-State 2m Transmitter - With very inexpensive transistors. VE2DG 20 • The Mini Monitor- Every ham should have one.

W3UZN 22 • Audio Test Amplifier - This is very useful, too. W9SEK 24 • The Chicken Method - But aren't we all chicken? K4ZZV 26 • A Tubeless VFO for VHF - An old idea, but a good one. W1DFS 28 • A Toroidal Multi-Band Tuner - MBT's have hundreds of uses. W6SFM 30 • The Perfect Squelch - Very simple tone-control squelch. W5VCE 36 • A Digital Readout VFO - It's linear within 2 kHz and designed for 5-5.5 MHz.

WA9AXX 38 • A 50 kHz Calibrator - Fine for those old surplus receivers. W6GXN 42 • Junk Box Pre-Amplifier - Perk up your old receiver at no cost. WA4ZQO 46 • The Heath SB-100 - Heath's new HF transceiver works very well.

K2EQB 50 • High-Frequency Power - Don't throw away that 400 Hz generator! WA6NlL 54 • Tech Schools for Ham Training? - They're good for commercial training, too.

W0RA 58 • The Knight TR-106 and V-107 - Knight's new 6m transceiver and VFO make a nice pair. WA1CCH 62 • A Curtain Going Up - Why not use a Bruce curtain and work more DX?

W2EEY 66 • Another Look at the Like-New Circuit - A few changes make this good circuit even better. W2DXH 72 • Gus: Part 14 - Gus goes to Aldabra, and around the U.S.A. W4BPD 76 • Coaxial Connector Handbook - Part two of WA6BSO's series on coaxial systems discusses the types and uses of coax fittings. WA6BSO 93 September 1966 (#72) • Compact Six and Two Transmitter - Here's a very clever 60 watt rig; easy to build, too. K6RIL 6 • Poorboy Mark II Quad - A simple, light, three-band quad. K4USK 14 • 5 dB Gain on 75m Mobile - Increase your mobile signal at low cost.

W3BTQ 20 • Accurate VHF Frequency Measurements - Use your BC-221 for high accuracy on two meters. W5WGF 22 • Add SSB AGC to Your Receiver - It's not hard or expensive. W1OOP 26 • Ultimate Station Control - You mean you're using a 89 cent knife switch?

W2AJW 30 • Match Box Tuner - W6BLZ's version of a Johnson antenna tuner. W6BlZ 38 • Two Transistor Testers - One simple, the other simpler.

Both work well. W6AJF 4 • Transistor Voltage Regulator - Need 9 to 28V at 10A? WB6MOC 46 • A Visit to The R.L. Drake Company - A short tour of their factory. W0PEM 50 • Try Homebrewing Now - It's not hard or expensive. WB2JQC 5 • Diodes for OT's and Beginners - There's no reason not to understand them.

W2DXH 54 • Two Meter Repeater - Even if you don't need a repeater, this is interesting. W5KPZ 58 • Complete Overload Protection - This one's pretty original. W4ZUS 66 • Heathkit HM-15 SWR Meter - Ken likes it. W7IDF 68 • A Pox on Your Junk Box - Maybe some people shouldn't build. WA6JNI 70 • Drafting for the Ham Writer - This article contains charts of our schematic symbols. K0EFC 72 • Lafayette HA-650 Transceiver - Six meters-portable and carefree. WA1CCH 78 • Conar 800 TV Camera Kit - Like to get on ham TV inexpensively?

This'll help. W3WTO 82 • Gus, Part 15 - Gus continues his visit to the Seychelles. W4BPD 86 • Coaxial Accessories Handbook - The third part of Jim's series on coaxial systems covers antenna tuners, baluns, switches, relays, dummy loads, SWR bridges, and attenuators. WA6BSO 93 October 1966 (#73) • Integrated Circuits - How will they affect you? WA1CCH 4 • EI Marrinero - An inexpensive eighty meter SSB transceiver. W6BlZ 6 • Two Tubes for Two - SSB on two with two tubes and a twenty meter transceiver.

K9EID 16 • 432 MHz Transmitting Converter - Not too expensive or hard to build. K6RIL 18 • A Two Meter FET Converter - Low-noise, low-cost and low cross-modulation. K6HMO 22 • Electronic Thermometer - Make sure that your linear doesn't cook. K5ILG 26 • Controlled Avalanche Silicon Rectifiers - There's no need for those shunting capacitors and resistors. W9EGQ 26 • Telegraph Keys - Look what's happened to them. WA6CEZ 30 • 220 MHz Receiver - A super regenerative receiver for poor folks. WB2EGZ 38 • Ham TV, Let's Get Going - Part 1: Theory, testing and receiving.

Part 2 next month. K3ADS 42 • The Multical - A multi-purpose crystal calibrator. K9VXL 48 • Connectors for Surplus Tubes - Use those 2C39s and 4X150s you got so cheap. K2ZEL 50 • DX Vertical - Very simple, very cheap, very effective. W0IFY 52 • The Humidivox - Here's a new idea for avoiding citations. WA2IKL 58 • Gus, Part 16 - After you read this, you'll won't to move to Aldabra. W4BPD 60 • WTW and You, Mr.

DX'er - And the WTW countries list. W4BPD 66 • The Future of the 10 Meter Band - It'll be coming to life in not too long. Nelson 70 • The WRL Duo-Bander - Ralph likes it; two bands for 50 cents per watt.

W8QUR 74 • The RF Discriminator - It's little-known to hams, but very useful. K7DEP 78 • AM vs.

The Carrier - Here's proof that a carrier is not affected by AM. W7CSD 82 • Propagation - How do you like our new propagation charts? Nelson 88 • Zener Diodes - Here's an excellent article that explains Zeners in detail.

Tells you how to check and use surplus ones, too. W2DXH 108 November 1966 (#74) • 80 Watts on Two Meters - A worthy successor to Bill's 50 watts for 50 meters.

K1CLL 6 • The Novice Class - Then and Now - How it's changed over the years. W7OE 12 • Tuning the RTTY Signal - You can't receive teletype if you can't tune it. W4EHU 16 • A WWV Receiver for $5 - Convert a simple transistor set to receive 2.5 MHz. W2DXH 20 • Streamlined Transistor Modulators - You can fully modulate without a transformer. Thorpe 24 • Ham TV, Part 2 - The conclusion of this excellent article.

K3ADS 26 • High-Voltage Power Supplies - An individualist's thoughts on transceiver power. K6ZGQ 30 • VHF Antennas - Useful hints from one of VHF's most respected hams. W6AJF 38 • The Minican - A soup can version of the Cantenna.

W6JTT 44 • A Stable VFO for VHF or HF - Simple, inexpensive and effective. Transistorized, of course. K6RIL 46 • The X-Beam - Two small V-beams give a Rhombic-like pattern. W4TDI 50 • Remove the Drudgery from Ham Radio - Clever, but facetious, I think. WA2IKL, WA2ZCH 54 • The Humidivox - An original scheme to avoid certain FCC trouble. WA2IKZ 58 • A Disappearing Antenna - Now you see it; now you don't. W6DFT 62 • Custom Decals - A real thriller.

W9SLM 66 • A Simple C-R Bridge - Every ham needs a capacitance-resistance bridge. WB6AFN 68 • Down Range - AFETR - Life at missile-tracking stations doesn't sound bad. WA4NXC 70 • The Second Requirement - Are you getting full output from your transmitter? WB2HAL 72 • Heath SB-400 Modification - Use the SB-400 and SB-300 more effectively.

W4NJF, K4ASU 74 • The Heath GR-54 SWL Receiver - It's a nice inexpensive general-coverage receiver. W3UZN 78 • Healthy Ham Clubs - Improve your club, it's not hard. W6DDB 80 • Gus: Part 17 - Gus continues his visit in the Indian Ocean islands. W4BPD 94 • Ham Microwave Propagation - Important information for the ham interested in experimenting in our fascinating microwave bands.

WA6PZR 98 • WTW Progress Report - When are you going to join the growing list of WTW winners? W4BPD 106 December 1966 (#75) • Transistor Power Supplies - Useful information on low-voltage DC supplies. W6GXN 10 • The Sideband Escalator - Have you tried SSB speech clipping? W6TAQ 16 • A Ham Electronic Counter - Determine your frequency the modern way. K7UDL 20 • The Novice Pair - Build a practical, modern novice station. W1JJL 28 • A Lab-Type Power Supply - Regulated low-voltage output; PC construction. W6GXN 38 • QRZed the YL - The frustrations of an YL's husband.

WA6JNI 42 • Climbing the Novice Ladder - Part 1: The novice bug bites. W7OE 46 • A Simple HF Linear - It's not fancy, but it works well.

W7CSD 50 • The Heath SB-610 - Jim likes Heath's new monitor scope. W1DTY 54 • An IC Calibrator - Here's a modern marker generator. W6GXN 58 • LORAN - The Interloper on 160. W2IKZ 62 • PAK - The portable automatic keyer. K3QKO 66 • Make the Most of Magazines - Bind your ham magazines yourself.

W6DEG 70 • A Coax Coax Antenna - Here's a practical coax antenna. W1DCG 74 • Cheap DC-to-DC Conversion - Six gives you twelve.

WA2IKL 78 • Storage Batteries - Use storage batteries properly. W6JTT 82 • Return to Navassa - Photos from Don's recent DXpedition there. KC4AF 86 • Parabolic Antenna Design - Extensive discussion of parabolas and illumination. K6MIO 90 • Gus, Part 18 - Gus visits the Chagoes. W4BPD 98 • AM-to-FM Conversion - Use your Gooney Box on FM.

WA5CJG 100 • Goad Hand Sending - Some good tips from an old CW hand. VE7CT 102 • Now You See It - An invisible mobile installation. WA6DLI 102 January 1967 (#76) • An IC Crystal Calibrator - 10 and 100 kHz markers output; costs $13. KlDCK 6 • Transistor Converter Notes - Some new developments in Frank's popular VHF converters.

W6AJF 10 • A kW with the Amperex 6KG6 - A very straight forward SSB grounded-grid linear. W7CSD 14 • FET Transconductance Tester - A simple, yet effective checker; a scoop. W1DTY 16 • Climbing the Novice Laddar: Part 2 - Joe starts a homebrew project. W7OE 20 • The QRZ Machine - Something for the DXers. W6MUR 26 • Ham TV Converter - Three transistors are all you need. PA0BVO 30 • A Silect Six Meter Converter - It uses a FET RF amp and etched circuit construction. W5SJN 32 • Autostart RTTY Gear - A generator and converter for VHF use.

W6AYZ 34 • VOM Transistor Tester - It uses about five components. Thorpe 38 • Low-Power Attenuator for Ham Use - They're cheap, yet useful to 450 MHz.

WB6AIG, WA6RDZ 40 • A FET S-Meter - Another good use for inexpensive FETs. W6GXN 42 • Unwanted Feedback - A lucid discussion from one of 73's top authors. W2DXH 46 • Equipment Protection - Are you taking adequate steps to protect your gear? K5JKX 50 • Etched Circuit UHF Dipmeters - 130-480 MHz; very clever. W1JJL 54 • Hamming VK9-Style - Like to go DXpeditioning on a far island? VK9TG 58 • SINPO and SINPFEMO - Another approach to signal reporting. DJ0HZ 62 • 432 MHz Antenna Filter - A coaxial filter for the 70 cm band.

W6AJF 64 • Six Meter Final Amplifier - A useful 100 watt amplifier for low-power rigs. K9EID 65 • 73 Reviews the Drake 2-NT and 2-C - A good 100 watt CW transmitter and hybrid receiver. W1DTY 66 • A Simple Voltage Calibrator - Jim tells why your meters aren't perfect, and how to live with them. W2DXH 70 • The Link - A signal grabber for two.

W6HGX 78 • Techniques in Tone Signaling - Tones can be very useful for hams. WB6MOC, K6YTY 82 • The Vanguard 501 Camera - It's an excellent quality, inexpensive TV camera. WA1CCH 86 • The Shackcom - A simple ham intercom. W8MQW 87 • Gus: Part 19 - Is a flat Coke better than none? W4BPD 88 • A Little About Noise - A technical article for those who really want to understand noise. K6ZGQ 92 • The Knight-Kit KG-640 YOM - A fine, taut-band VOM at a good price. W1DTY 102 • The Motorola HEP-Line - Good, available, inexpensive transistors at the corner radio store.

WA1CCH 104 • The Knight-Kit TR-107 - Knight's new two meter transceiver looks good. KlRA 105 • What's New For You? - 73's new monthly technical column. WA1CCH 109 February 1967 (#77) • Getting Acquainted With Integrated Circuits - Here's practical information on using inexpensive ICs. Thorp 6 • Using Low-Cost FET's on Six - Two $1 FETs and a cheap PNP give 2 dB NF and high overload resistance. W6AJF 11 • Low Cross-Modulation on Two - A $ 1 FET makes an excellent mixer on two.

W6AJF 14 • The 30P1 Linear Amplifier - A peasant's 30L1: Four 811As. W1DBN 18 • An Improved Multiplier for UHF - Get enough local injection on 1296 MHz. W6OSA 22 • A Broad-Band 80 Meter Vertical - 3.5 to 4 MHz with no adjustments. VE1TG 26 • A Reliable UHF Directional Coupler - Here's a UHF bridge you can trust. WA6SXC 30 • A Solid-State Antenna Relay - Fast, low-loss, high-power, and efficient. K2IYC 34 • Video Camera Tubes - There are lots of different types. WB2GYS 38 • A Semi-Precision Variable Capacitor - It's accurate to 1 pF and uses a component that's in almost every junk box.

W1DTY 42 • Down with the Rotator - A cheap, useful scheme for small beams. W3BTQ 47 • Mobile Logs - Personalized - Save time and trouble in mobile logging. WB6KFI 48 • Add a Crystal Filter to Your Receiver - For less than $10. W1USM 50 • A Reactivator for the Semiconductor Activator - In other words, a battery charger. K6EAW 52 • The Ancient Marriner - An antenna tuner for coax-fed beams. W6BLZ 54 • Climbing the Novice Ladder - Part 3. W7OE 56 • Portable Operation Without Tears - Useful hints for the prospective portableer.

K3LNZ 60 • Practical Tips on Transistor Transmitters - You won't want to miss this one unless you're an AO. K0CJF 64 • UHF-Microwave Phased-Locked Oscillator - Stable within less than 1 Hz at 6 GHz! K3OJK 68 • 73 Tests the Eicocraft CPO - Eico's new line of inexpensive kits looks like fun. 78 • 100 Watts on Two With Compactrons - Uses two 7894s in push-pull.

K1CLL 80 • The Poor Man's Occasional Antenna - Cheap, dirty, and effective. W7CSD 84 • Rewinding the Power Transformer - It's not hard, as this article explains. WB2PTU 88 • The Drake L-4 Linear Amplifier - Drake's new linear is very nice. WlDTY 90 • The Carrier Again - Part 2 of 'AM vs. The Carrier'. W7CSD 94 • A Simple Current Controller - Very simple and cheap. K5JKX 96 • Equalizing AFSK Tones - Some notes for RTTY'ers.

K8ERV 96 • The International Crystal SBX-9 and SBA-50 - SSB exciter on 9 MHz and mixer to six meters. W1DTY 100 • The National 200 - National's inexpensive new transceiver is attracting much attention.

W1DTY 104 • An Universal Code Monitor - A clever idea for a simple monitor. K9VXL, K9CLH 108 • Gus: Part 20 - A crisis in the Indian Ocean! W4BPD 110 March 1967 (#78) • A Digital Identification Generator - Send your call automatically with no moving parts. K6ZCE 6 • SSB Proof-of-Performance - How does your station perform? K6YKH 14 • A Non-Tiring CW Monitor - Pure single sine waves are monotonous. Try this instead.W1DCG 18 • Seven Elements on Twenty - On a 60' boom.

WA4WWM 20 • Climbing the Novice Ladder - Part 4: The code is almost conquered. W7OE 24 • Going RTTY: Part 4 - Frequency shift keying.

W4RWM 30 • A Solid-State Product Detector - Uses two cheap transistors. WB6CHQ 32 • AMCOM: Amateur Mobile Communications - The Phil-Mont Radio Club's emergency stations. K3CEE 36 • The Slide Rule Made Easy - It is easy, too. W1MEG 40 • How to Make Better Panels - Jim's suggestions work.

I tried them. W2DXH 46 • An IC Keyer - Here's a different integrated circuit keyer. W5FQA 50 • Edison: The Fabulous Drone - Was Edison really a great genius? Elkhorne 52 • A Simple RF Voltmeter - Make a very useful piece of test equipment. It's low in cost.

W1DTY 56 • SDRAWKCAB Power Supply - Guess what this is? K1UBA 62 • A Panadapter Converter - It helps you get decent patterns on your panadapter. WB2CCM 64 • 73 Useful Transistor Circuits - If you're a builder, you'll like this one. It's a fantastic collection of useful, simple circuits using transistors for all sorts of receiving, transmitting and test equipment.

W1DTY 65 • The Importance of Being Grounded - It is important. WA6KLL 98 • Gus: Part 21 - This month, Gus visits darkest Africa. W4BPD 100 • The Waters Dummy Loads - One is plain; the other a wattmeter. W1DTY 106 April 1967 (#79) • The Super Duper Super - It may not be a super, but it's sure super duper. WN1ECCH 6 • A Toroidal VFO - An excellent VFO with many interesting mechanical features. W4BRS 10 • Transceiver CW Filter and Monitor - Improve your transceiver's CW capability.

WlDCG 14 • Dreadful Ham Cliches - Special for April. K3SUK 16 • The Converter Converter - Stick it between your UHF converter and your low-frequency receiver. W1OOP 18 • The Ratnick Two'er - It's a simple transmitter for local contacts. WA2RAT 22 • The Clinic - More first-of-April nonsense. K3SUK 24 • Cardboarding - An interesting approach to experimenting and records.W6FTA 26 • Buried Antennas - They don't work too well, but they may be the best you can do. W1DCG 34 • A Transistor Wien Bridge - 20-200,000 Hz with a simple, easy-to-build circuit.

W6GXN 36 • Ham vs. Ham - We hope these things don't make you MAD. K3SUK 40 • Air Mobile - Like to try operating from an airplane?

W3ZP 42 • FM Subcarrier Generator - A simple way to add sound to your TV transmissions. W6ORG 46 • James Dandy Diode Tester - Check your diodes very quickly with this simple instrument.

W2DXH 50 • Some Commandments for DXing - CQ's new DX editor offers some excellent hints. K4IIF 58 • High Frequency Single Side Band Transceivers, Receiver-Exciters, and Linear Amplifiers for Hams - Here's a complete listing of all high frequency SSB gear by comparison table. This special section also includes a photograph and description of each unit. W2DTY 64 • Ferromagnetic Beads - Tiny ferrite beads can make excellent chokes from plain wires. W6SFM 84 • A Canadian Assault on FP8 - A DXpedition-vacation to Ste. VE1ADH 86 • he Clegg 66'er - Squires-Sanders mate to the 22'er. W1DTY 90 • Climbing the Novice Ladder: Part 5 - A stroke of luck for Judy.

W7OE 98 • Gus: Part 22 - If you enjoy this series, you should get the DX'ers magazine. W4BPD 106 May 1967 (#80) • The Quad-Quad-Quad - Sixteen quads on a single mast for 144 and 432. VE3DNR 6 • The Expanded Quad - More gain and directivity on 10, 15 and 20. WA5KXY 16 • An Inexpensive DX Antenna - A low-cost, two-element quad for DXer's.WA6WUI 20 • The Miniquad - A practical small size quad for twenty meters. WA2APT 23 • A Full-Size 7 MHz Rotary Cubical Quad - For hams with big backyards.

K6DDO 26 • Experiments with Quad Antennas - Optimum designs for HF and VHF quads. IIRR 32 • The Half-Quad Antenna - Half a quad is better than none. W0SII 35 • The Three-Element Quad - For cracking DX pileups on 20 meters. K8YIB, K8DYZ 38 • A Light Four-Element Quad for 20 Meters - Lightweight but potent. K0UKN 41 • Tilt That Quad at a Dollar a Foot - Forty feet for $39.75. W7UXX 46 • An Easy-to-Erect Quad - The 'Down-Under' approach to building quads. VK5BI, VK5VB 50 • Quad Bibliography - Twenty years of quad antennas.

W1DTY 53 • A FET VFO for 80 Meters - High-stability with FET. W1DTY 56 • Tube Symptom Troubleshooting - If you must use vacuum tubes.

WA0NEA 61 • A 200 Watt Dummy Load for $2 - For low-interference tuning. W2OLU 66 • The Easy Way to Decibels - But not completely without math. K3PXT 69 • The Highflyer - A complete homebrew receiver for 80 through 10.

W6BLZ 72 • Geometric Circuit Design - Designing complex circuits with a ruler and protractor. Bradford 82 • A Field Effect Transistor Converter - Low cross-modulation on 10, 15, and 20. K6DQB 86 • WWV on the Mohawk - Without a lot of work. K8KWQ 89 • High-Pass Receiving Antenna Filters - Eliminating spurious signals in HF receivers. K6KA 90 • Climbing the Novice Ladder: Part 6 - Joe and Judy take the code test.

W7OE 97 • The Heathkit HW-32A 20 Meter Transceiver - One of Heath's new single-banders. W1DTY 102 • Gus: Part 23 - A hot trip through darkest Africa. W4BPD 106 June 1967 (#81) • The Whole of the Doughnut - Toroidal coils for kilowatt amplifiers.

W4BRS 6 • A 1296 Grid Dipper - 1050 to 1320 MHz with a converted APX-6. W1DTY 16 • Using FETs in the Command Set Transmitter - Results in a very stable VFO. K3LCU 23 • The Dichotomy of a Tube Man - Putting on FET in the BC-906 frequency meter. W5SOT 26 • Converting the Swan 120 to 6 Meters - Be prepared far the six meter openings this fall.

K6RIL 28 • Military Quartz Crystals for the Radio Amateur - A survey of surplus crystals. W0HYB 36 • Converting the BC-728 - A fine superhet for 160, 80, and 40 meters. 38 • Photographing Your Electronic Gadget - Must reading for authors.

VE3DAN 42 • Panoramic Display from the AN/APA-38 Indicator - Low-cost panoramic reception. W6JTT 46 • RDR Receiver Conversion - Crystal controlled channels on 220 MHz. K3HIL 48 • Build a 40 Meter Rotable Dipol - Maximum effectiveness on 40 meters with a shortened dipole. WB2GZL 50 • Operating the BC-611 Walkie-Talkie - Great for short distances over flat terrain.

W1MEG 55 • A Poor Man's Transmitter Cabinet - Using old TV cabinets. WA4RHT 56 • Micro-Logic for Non-Logical Users - How to use digital integrated circuits in ham projects.

W6GXN 58 • Proportional Transistor Control of AC Circuits - Solid-state replacement for a variable transformer. Ives 66 • Phone Patching - More Light in a Gray Area - From the legal point of view. K8BLL 69 • The Heathkit SB301 Receiver - One of Benton Harbor's newest releases. W2JDL 76 • Face-Lifting the TS34/AP Oscilloscope - A great scope for less then twenty dollars.

K6GKX 110 • Climbing the Novice Ladder: Part 7 - Judy and Joe take the written test. W7OE 111 • Ham Public Service and Broadcast Stations - Another approach to better public relations. K4HKD 117 • Gus: Part 24 - Sir Gus tours ZS-land. W4BPD 119 July 1967 (#82) • North of the Border - Amateur radio in Canada. VE1TG 6 • Suppressed Carrier Amplitude Modulator - Double-sideband adapter for AM rigs.

VE7PQ 10 • A Homebrew 50-Foot Tower - Low-cost, self-supporting, tilt-over construction. VE6KS 12 • Simplified Transistor Design for the Ham - It's easy when you know Ohm's law. VE1ADH 14 • VE0 Ahoy - Canadian maritime-mobile stations. VE1TG 22 • World's Fair - 1939 - And the W2USA radio club. Staff 30 • Plain Ground Plane: Antenna - An economical antenna for working DX. VE7BBM 36 • The Hybrid G4ZU Superbeam - A very effective three-band beam for 10, 15, and 20.

VE3AHU 38 • A Slow-Scan Television Monitor - An economical design using surplus components. W9VZL 42 • FET Pre-Amplifiers for 144 and 432 MHz - 2.5 dB noise figure on 432. W6OSA 48 • A 30 MHz IF Strip Using Integrated Circuits - 85 dB gain in a small package. W7AKS 52 • An Un-Guyed Vertical Antenna - Very useful for small backyards. W6JTT 56 • Two Cheap Crank-Knobs - Great arm savers for wide tuning ranges. VE3BUE 58 • The Tri-Amp - Versatile audio test unit.

K6UGT 61 • Wide-Range VHF-UHF Dipper - 130 to 1,300 MHz with transistors. K1CLL 64 • A Few Tower Hints - Protecting your rotator against the weather. WA1ABP 70 • Monitoring With an Oscilloscope - Check the quality of your transmissions. W0OPA 72 • The Basic Desk - A neat operating desk for the itinerant operator. W0QOJ 76 • Is Rock Bounce Practical? - Mobile experimenters take note. G3BID 78 • Moonray - Amateur radio on the moon.

W1DTY 80 • Transmit Control With the 32S-1 Receiver - Without modifying the receiver. W6EUV 82 • Project: High School Amateur Radio Club - How to get one going and maintain it. WA0NDV 84 • Heath HR-10 Modifications - Increased sensitivity and selectivity. VE3FYL 86 • Glub, Glub, I'm Drowning - In a sea of noise. WA0NQL 88 • The Galaxy V, Mark 2 - A review of Galaxy's newest transceiver. W1DTY 94 • The Heathkit SB401 Transmitter - Benton Harbor's new companion to the SB301.

W2DJL 98 • Climbing the Novice Ladder: Part 8 - Judy and Joe approach the pinnacle of achievement. W7OE 102 • Gus: Part 25 - Capetown, South Africa. W4BPD 108 August 1967 (#83) • Push-Pull Class-B Grounded-Grid Linear - An unusual, if not new, approach to high power. VE3AAZ 6 • A Frequency Calibrator for the VHF Man - Finding yourself on 144 and 432 MHz. W6GXN 12 • The Semi-RTTY System - Solid-state AFSK oscillator and terminal unit. K0JXO 20 • Mobile Power - The Alternator - Their use and abuse. W9NLT 24 • Visual Monitoring of Remote Carriers - What does your CW signal look like?

W3RMI 30 • Power Losses and High SWR - SWR and its side effects. K2DXO 34 • Using Toroids in Ham Gear - How to wind toroidal inductors and use them. VE1ADH 36 • Solid-State Alternator Regulator - High-performance at moderate cost. K6UAW 40 • The Great Dipper - Transistor emitter-dipper for the VHF'er. WA0AYP 42 • A 20 Amp Power Supply - 20 amps for 20 dollars.

WA4SAM 48 • X Marks the Spot - A simple 'no-holes' mobile antenna mount. WA3AJD 50 • Go-Go-Mobile - A low-cost mobile antenna for 40, 20, 15, and 10.

W6IEL 52 • The Front-to-Back Ratio of an Automobile - Radiation patterns of different antenna mounts. G3BID 56 • Beginner's Beam for 10 Meters - Get ready for the band openings this winter. VE1TG 60 • Simplified Printed Circuits - Making printed circuits at home. K5IRP 65 • Designing Transistor Oscillators - If you've been having trouble designing transistor oscillators to fit your requirements, this article may be the answer.

Most of the math has been eliminated by several labor-saving nomographs. W1DTY 66 • Gus: Part 26 - Tristan de Cunha. W4BPD 84 • Climbing the Novice Ladder: Part 9 - Judy and Joe receive their licenses.

W7OE 102 September 1967 (#84) • The Synchronous Detection Process - If you must use AM, get the most out of it. W3DUQ 6 • A 160 Meter Sidewinder - A sideband package for the low-band. W6JTT 12 • Building Blocks - A 12 to 18 MHz receiver for VHF converters.

WB2EGZ 17 • VSWR Supreme - A compact VSWR unit that can be built into your rig. W4BRS 20 • Dual-Band Use of Single-Band Beams - Get the most use out of those antennas. W2EEY 26 • Grounded-Grid Filament Chokes - How to design and wind your own. W6RET 30 • 200 Hertz CW Filter - Maximum selectivity with telephone coils. K7UDL 34 • Observations of Note by a VHF Addict - Hilltopping in Southern California.

WB6JLC 37 • Getting a Start in Amateur Television - Off on the right foot. WA2EMC 40 • A Compact Linear Amplifier - 500 watts in a small package. VE2AES 44 • Cathode Keying Filter - Getting rid of key clicks. W6BLZ 48 • A Simple Resistance Bridge - Precision resistance measurement at low-cost. VE3AHU 51 • Compact Heat Sinks - Using copper pipe caps for cooling semiconductors. Ives 52 • Evaluating Antenna Feed Systems - Using time domain reflectometry.

W7QAG 56 • Cheapskate's 'On the Air' Sign - Eliminating in-shack interference. WN3EWV 62 • Relay Energization in Fixed and Mobile Equipment - Just what the title says. VE4RE 64 • How to be a Ham - By Really Trying - It isn't hard if you try.

VE3GLX 66 • Do-it-Yourself Mobile Mount - Nice looking but simple floor mount. W6APE 68 • Washing Out Your (Antenna) Shorts - Keep road salt and water out of your mobile antenna.

W3RZD 70 • A Polarity Sensitive Meter for the Sightless - Used for checking diodes, capacitors, and resistors. WA2BCX 72 • Climbing the Novice Ladder: Part 10 - FN offers Judy and Joe some sage advice. W7OE 74 • Trindade Island DXpedition - The DX-capades of PY2BZD/PY0. PY2BZD 82 • Gus: Part 27 - Gough Island.

W4BPD 84 • DX'ing - How to get the most out of chasing DX. W2NSD/1 88 • The Knight-Kit KG-663 Low-Voltage Power Supply - An excellent power supply for the ham shack.

W1DTY 94 • Heathkit SB630 Control Console - Handsome mate to the SB301 and SB401. W2DJL 96 October 1967 (#85) • Incentive Licensing. 2 • The 2Q Receiver - 22 transistors; FETs in the front-end.

W5ETT 8 • The Really Rugged Rotator - For big arrays in bad weather. VE1TG 14 • Designing Permeability-Tuned Coils - Simple and accurate. Marovich 20 • A FET Converter for 40 and 160 - Beats vacuum tubes. K6DBQ 26 • West Coast VHF Antenna Measuring Contest - At the 1967 VHF Convention in Fresno. W1DTY 30 • A Slow-Scan TV Picture Generator - Another simple approach to slow-scan.

K7YZZ 34 • VHF Log Periodic Antennas - Plus a fully designed LP for 432 MHz. K4GYO 40 • The Dual-Gate FET - Using the 3N126 in a SSB generator. W1OOP 48 • Getting the Most Out of Your Receiver - Read and heed. W0HJL 50 • The Silent Shepherd - Emergency at midnight. W6OQY 52 • Torticollis and All That Jazz - A simple pain in the neck! WB6QOT 57 • All-Band Rotatable Dipole - 80 through 10 with one rotatable antenna.

WB2WIK 60 • Simple Gamma Match Capacitor - Not a new idea, but a good one. K0UTX 64 • Personalized QSLs for Greater Returns - Are you having trouble getting the QSLs for WTW? W6NIF 66 • Pioneer DX - Chasing DX in the early days. W7OE 70 • DX'ing - The right approach helps.

W2NSD 74 • Gus: Part 28 - Sir Gus lands on Bouvet. W4BPD 85 • The Knight-Kit T-175 6/10 Meter Linear - High-performance for the band openings this winter. W1DTY 90 November 1967 (#86) • Integrated Circuit Frequency Counter - A 100 kHz counter for less than $50.

W0LMD 6 • 2 Kilowatt PEP for Six Meters - A complete transverter for 50 MHz. K6RIL 12 • A Pulse Generator for the Amateur - Versetile test equipment for the shack. W6GXN 20 • Mighty Four on Six - Low-cost transistor transmitter for six meters.

K9VXL 24 • Incentive Licensing - Complete story on our new regulations. Gold Rush Free Download. W1DTY 28 • Feeding the Cat Underwater - Experiments with underwater radio propagation. K6BIJ 34 • Mobile Antennas for the Non-Mobileer - Using the ring-radiator antenna. W2EEY 38 • Why Abuse Semiconductors? - The care and feeding of transistors and diodes. VK7RG 42 • DC VTVM - A sensitive, high-impedance VTVM of simple design. W2DXH 53 • 220 Wavemeter - Find your way around the forgotten band.

WA2TOV 60 • Choosing Accessories for the Novice Ham Station - What do you need besides a transmitter and receiver? W7OE 62 • Trim for Ten - Adding bandspread to your loading capacitor. DL5AF 68 • The Longest QSO - A new world's record. WA3GEV 70 • Death of Amateur Radio - Food for thought.

WA8FVS 73 • Spook Up Your Club's Civic Activities - Goblin patrol. K4HKD 76 • Simple Modifications for the HW-12, 22, and 32 - Greater frequency coverage. DL4XO 80 • Project Milk Wagon - You two can form a club. 3C3FKY 82 • The Drake MN-4 Matching Network - Great for multi-band operation with single-band antennas. W1DTY 88 • The Omega-T Antenna Noise Bridge - A new approach to antenna impedance measurements. W1DTY 90 • The Comdel CSO-11 Speech Compressor - More punch in the pileups. K1RA 94 • Six Hours with Blintz' DXpedition - Journey to Jordan.

4X8HW 98 • Gus: Part 29 - Bouvet Island. W4BPD 103 December 1967 (#87) • 250 kHz to 29.75 MHz Stabilized Converter - A phase-locked receiver with 500 kHz bands. K5LLI 6 • Some Experiments With Stacked Beams - Getting more gain out of your array.

VE1TG 14 • Simple Antenna Mount for Satellite Work - An el-ez antenna mount using two rotators. W4HJZ 20 • Strong Signal Interference - AGC modifications for improved cross-mod performance. K6KA 22 • Charging Dry Batteries - An approach to longer-lived primary cells. WA6NIL 26 • A Forty-Meter Vertical Array - Lots of gain for 7 MHz DX'ing. K8DOC 30 • Hamateur Acoustics - One man's sound is another man's noise.

W3RZD 34 • A Workbench Clutter Filter - Get rid of that mess on your work bench. WA6UVS 38 • General Information About Amateur RTTY - What it's all about. WA0OBJ 42 • Computer Card Construction - Use those surplus printed-circuit computer cards.

K1EUJ 48 • Station Accessory Control Unit - Put all your station controls in one neat box. K6ZHO 52 • A True Parasitic Monitor - A no-power CW monitor. K4FQU 56 • The Mini-SWR Bridge - Perfect for tuning up antennas. W2EEY 60 • Yes, Old Timers, There is a Santa Clause - I'd mark that true on a true-false test. W0HJL 62 • The Contest Caper - How to win contests.

K8KFP 66 • Jean Shepherd, WB4DOH -The piano protege. Roberts 79 • Bmmmfff! - The information explosion. G3KPO 83 • The Waters Band-Adder Antenna - 20, 15, and 10 with a 75 meter mobile antenna. W0HJL 84 • Hallett Signal Saver - Top-notch shielded ignition system.

WB6KFI 86 • Gus: Part 30 - Return to South Africa. W4BPD 91 January 1968 (#88) • IC Square-Wave Generator - Getting acquainted with Integrated Circuits.

WA4ZQO 6 • Tuning In on Bonadio's Satellites - Strange noises on the air. W2WLR 10 • Sideband Filters - The least understood pert of sideband gear. WB2GYS 14 • The Two Meter Groundplane as a Gain Antenna - Gain where the action is. K6MVH 18 • RF Insertion Amplifier for Two Meters - More drive for the final. K1CLL 20 • 2 Elements Spaced a Quarter-Wavelength - Simple beam antenna for 15 meters.W2EYY 22 • Wide-Band Baluns the Easy Way - Multiband balun.

K4ZZV 24 • Hamming - The Navy Way - Deluxe morale booster. K6GKX 26 • Fire in the Hamshack - Are you ready? K4SEL/DL5AF 34 • Diode Circuits Handbook - Special insert, 28 pages of diodes. WA1CCH 1A • RTTY In Holand and Belgium - Europe on RTTY and where to look. PA0VDZ/ON8NC 64 • The Wolverine - 100 watts on all bands. W6BLZ 66 • A Homebrew Operating Desk - A place for everything. WB2WYO 74 • Novice Data - Do's and don'ts handbook for beginners.

W6DDB 88 • Gus: Part 30. W4BPD 114 February 1968 (#89) • An Integrated Circuit Electronic Counter - A useful piece of ham gear. W1PLJ 6 • How Come?

- A good question. W4YM 14 • An Amateur Tries ICs - The uses of integrated circuits. VE3DAN 16 • 100 kHz Thin-Line Pulse Generator - Frequency standard with ICs. W2DXH 24 • The Nurture and Care of a Junk Box - Selective collecting.

W0HMK 30 • How to Plan Your Own DXpedition - DXing in style and comfort. W4PJG 34 • How is Your Club Paper - Good or Bad? - Make the readers notice. K6GKX 38 • High-Quality Hybrid Receiver - Restoring the lost art of homebrew. VE1TG/VE1ADH 42 • Tips for the CW Contester and DX'er - From one of the great CW contesters. KH6IJ 50 • How to Publicize Your Club - Getting activities into print.

K4HKD 54 • Technical Aid Group - Where to look for help. 58 • The Quartenna - How to shrink a Cantenna. WA6OBH 64 • Hydronics or Radio? - Underwater propagation. VE7BS 66 • Electronic Temperature Measurements - Determining temperature rise in components. K6EAW 70 March 1968 (#90) • Narrowband Frequency Modulation - Using voltage variable capacitors. WB2CPG 6 • Transmitter Keying with Transistors - Solid-state project for the CW hound.

W6HEK 14 • The Mini-Mitter - The smallest transmitter? W7OE 18 • Receiver Front-End Protection - Protection for the transistor receiver. W6AJF 20 • A Regulated DC Voltage Divider - Reducing voltage while maintaining regulation.W5NPD 24 • QSL Manager - How to alienate your postman. W4NJF 26 • 160 Meter Flat-Top Antenna - Long antenna on a short lot. W3WPV 30 • Go Ahead - Run Away to Sea - Make a vacation pay.

K4UDP 32 • Operation Deep Freeze - 10 years in the Antarctic. W6GKX 38 • Crystal Shopping - Double duty for X'tals.

WA4UZM 44 • Witching for Better Grounds - One for the skeptics. W7CJB 46 • The Ham - A view from the XYL. Day 50 • Getting the Most Out of Link Coupling - From the VHF point-of-view. K1GBF 54 • More on More Contacts From Within - Antenna hints for apartment dwellers. K3RXK 54 • S-9-Manship - How to put a man down. W6DFT 56 • The RF Patch - Patch panel solution to an old problem.

W6JTT 58 • 73 Certificates - You'd be surprised how fast they move. 60 • Transceiving with an Outboard Receiver - Making the most out of the receiver. WA2APT 62 • A Ham's Shack is His Castle - Wanna bet? W6LNG 64 • Converting the TA-33 Jr. To a Full-Sized 15 Meter Beam - A solution to the sun spot cycle.

K4ELB 78 • The Scientific Method - Hoo-boy, that smarts. Foster 82 • Getting You Higher Class License - Part 1 - A new approach to studying theory.

Staff 92 April 1968 (#91) • The Vidicon Minicamera - Using low-cost, high-quality semiconductors. W8TYY 6 • The Little Gem Fuse Tester - There's still time to use this one April 1st. W7CSD 15 • Methods of Transceiver CW Switching - Six circuits to achieve easy CW operation. W1DCG 16 • The Polar Key - Homebrew keyer using inexpensive polar relay. K4YWS 20 • Checking Your VSWR Indicator - Are you sure your SWR bridge is trustworthy?

W5EHC 22 • Video Mixing Amplifiers - Producing a good composite video signal. W8VCO 24 • A Solid Dead Man - Don't let the wind get your tower down. WA1ABP 30 • VHF Operation by Remote Control - Q5 S9 from any location.

W6MVH 32 • An Invisible Antenna - A new antenna theory. W1EMV 42 • Using Your Electromagnetic Wave - Communication as it should be. WA5HPV 44 • ITV Got You Down? - Getting rid of the buzz-saw. WA7CSK 46 • The YF Fights Back - If you can't lick'em, join'em.

WA6SPT 48 • A Career in Electronic Engineering - Areas where engineers are needed. W6JTT 50 • What is YOUR 'Amateur Q?' - How well do you know the FCC regulations? K3STU 52 • And They Called 'Mother Shipton' Crazy - Remarkably prophesy from 500 years ago.

K4FQU 56 • Recovering 'Lost' QSLs - Helping the post office help you. K6UMV 58 • Project MOONRAY - Amateur radio on the Moon in 1970. 60 • Audio SSB - A new use for an AFSK oscillator. K6ICU 64 • Installing a Transceiver in a Rented Car - Wonder if Hertz would approve? G3BID 66 • Preventive Maintenance - Curing problems before they start.

K3KMO 70 • You Can Pass The Extra - Or so the man says. K6YA 73 • Use of Q-Multiplier to Increase Intelligibility of Received Voice Signals. Ives 74 • Crystal Etching Tips.

W4AYV 76 • Take Uncle Alf's Advice - Uncle Alf talks about coax baluns. W6NIF 86 May 1968 (#92) • The UFO Network - Setting up to track the whetever they ares.

W2NSD/1 2 • Practical Miniature Antennas for 80-10 Meters - Only 80 inches for 80 meters! W8VVT 6 • The Diamond Array - One-element 40M quad which also works on 20 and 10. W6LLN 10 • Why Not? - Why not put a VHF yagi beam on your low-band beamm boom? W6HGX 11 • Do It With Wire - A wire antenna fed with twinlead that works all bands. K3QKO 14 • Durable Gamma Match - Clever idea by one of our DX newcomers. K4IIF 16 • How to Hang a Dipole - Including a haywire bridge to get it right.

W2DXH 18 • Matching Stubs - SWR depends on matching the antenna to the feedline. WA5STM 24 • Ten Meter Dipole - Simple, effective, wideband vertical dipole. W6BLZ 30 • Duo-Vee Beam - 10 and 15m beam on one boom with no interaction.

K1UFQ 32 • Computer Design of Beam Antennas - Great for those of you with a nice computer handy. WA4WWM 34 • A Primer of Basic Antenna Theory - This should count towards the Advanced study course.

W6ZGO 40 • 73 Hamfest for July 6th - Come on up to New Hampshire end have some fun with us. W2NSD/1 49 • Triangular Loop Beams - 40 through 10 meters. These may become very popular. W6DL 50 • The Selcal - An RTTY stunt box using ICs.

K8ERV 58 • Hardware Store Groundplane - Flanges, nylon pipe, aluminum tubing, it is all there. WA4UZM 71 • Are Phone Patches Legal? - If we tell you here you won't read the article. K6MVH 72 • Amateur Radio and Public Service - Getting set up on 7255 for emergency traffic. W2CFP 74 • Microfilm Your Magazines - How to do it. WA4HRX 76 • Advanced Class Study Course - Part 2 - Simple way to know your theory instead of memorizing answers.

Staff 82 • Technical Aid Group - These fellows will answer your technical questions. Staff 92 • A New Quad - The Reginair 321 quad.

WA1BUN 98 June 1968 (#93) • Transformer Tricks - 15 uses for odd transformers. W4LLR 6 • The ARC-5 Transmitter/Receiver - A new slant on an old favorite. WB6BIH 10 • Modifying the BC1206 - Using a Japanese transistor Radio. W6GXN 14 • APS-13 ATV Transmitter - Tail-end Charlie rides again.

W6ORG 16 • Varsatile Variable Power Supply - A simple bench supply. W6SLP 18 • Low-Cost Conversion of Surplus Oscilloscopes - Using the IP/69/ALA-2. W8JZI 22 • Crystalize that FM Rig - Where to find the right xtal! K9STH/5 24 • The Dollar-Fifty Super Nifty - A nifty CW filter. W3KBM 30 • Restoring Old Equipment - Or making the family think you got a bargain.

W9NLT 32 • New Life For an Old Work Horse - The 75A-1 isn't exactly surplus, but. K9STH/5 40 • Modification of the TRA-19 - Amplifier cavity to 432 MHz.

K6RIL 44 • Salvage Those Old Transistor Radios - Tricks with radios and recorders. K0VQY 46 • Counter Connections - How to use a counter once you get one. W3GKP 50 • Labels for Homebrew Gear - Making use of your typewriter. W4LLR 48 • Review of the Amphenol Millivolt Commander - A fine new volt ohmmeter.

W1EMV 56 • Poor Man's Mil Specs - Identifying military spec numbers. W4WKM 58 July 1968 (#94) • Let's Build a Tower - Sturdy wooden construction. VE1TG 6 • Why Not a Tilting Tower - With this method, why not? W6DL 12 • 40 ft Non-Conducting Sky Hook - Making the most of a phone pole. K7VBQ 16 • Burn Prevention - Asafe place for the hot soldering iron. VE3BUE 21 • The Beam Pole - Another phone pole idea. W7GBJ 24 • Tilt That Tower - Using the house for leverage.

W2AJW 28 • Panel Gap Filler - Another idea to fill the holes. Ives 33 • IC Audio Amplifier and Oscillator - ICs are here to stay. W7AKS 34 • The New Tower - Battling the building inspector.

WA2GXT 37 • New 160 Meter Allocations - Easy-to-read chart to give all the information on the new rules. Staff 39 • Some Audio Thoughts - Versatile modulator unit. W3KBM 40 • DB - Wait 'till you see the illustration. WB2PAP 42 • More on Xtal Etching - Using readily available chemical.

K6GKP 50 • Writing for Service Information - Communicating your problem. K2PTS 52 • Care and Feeding of a Ham Club - Part 1 of a new series.

W5NQQ 54 • Photographic QSL - Do-it-yourself QSLs. W3RZD 60 • WTW Report - Gus gives full listing of awards. W4BPD 62 • UFO Net Information. W2NSD 64 • 73 Subscription Premiums - Lots of goodies free. Staff 70 • The Anatomy of a Pile-Up - DXing.

G3BID 74 • Advance Class Study Course - Part 4, transmission lines and SWR. Staff 76 (#95) • Terminated Grid Linear Amplifier - An extremely stable configuration. W1DIS 6 • A Unique Transistorized Transverter - Using a conventional transformer. WA4JVE 12 • Photographic Printed Circuit Process - Printed circuit etching made easy. W6AYZ 14 • A Simple Method of Double Sideband Conversion - If you must go DSB, this is as easy as any. K5LLI 18 • Basic HF Receiving Converters - Getting more from your HF receiver.

WA4UZM 22 • 3 on 20 for 15 - $15 dollars, that is. A 20 meter beam. WA4YVQ 24 • The Mini-Boom Quad - An efficient Quad with spider array. VE6FS 26 • The Collinear Resurrected - End-fire array without sacrificing performance.

WA1DVB 28 • A Microphone Pre-Amp Clipper - More speech power without distortion. W2EEY/1 32 • Review: The Heath IM-17 VTVM - A versatile piece of test equipment. W2TQK 34 • Hamwriting - A veteran writer tells how.

K6MVH 36 • A Grounded Grid Linear Amplifier - 3.0 through 38 MHz in five steps. WA6WUI 42 • Displaying QSLs - A unique display method. VE3BUE 48 • Care and Feeding of a Ham Club - Part 2 - A series to save the club.

W5NQQ 50 • Advanced Class Study Guide - Part 5 - Receiver operation. Staff 54 • A $2.00 Phone Patch - Inductive coupling makes it legal. W6TRU 64 • Trapping Strong Signals - Making the most of your receiver. K6KA 68 • Review: The Hustler 4BTV Vertical - An antenna for small space. W6AJZ 70 • High-Quality Hybrid Postscripts - More on this fine receiver originally shown in February 1968 issue. VE3GFN 72 • How to Pass the Extra - By Learning - Overcoming the psychological block.

WB6BIH 74 • A Military Career for the Ham - The Armed Forces is looking for you! G5ACY 76 • I Rode With the CB's - How the CB'ers are steeling our thunder. K4HKD 78 • Transit Time - So? - A just noticeable difference. K9UYA 80 • Pilot Lamp Life - How to prolong the life of the lamps. WB6ZOA 84 September 1968 (#96) • Going VHF - In the Mobile. W9HDF 6 • Communicator Reborn.

W6HCX 14 • 432 MHz Amplifiers. W6AJF 16 • Quick Converters. W9NLT 20 • So You Think You're on Frequency. K6MVH 27 • Parallel T-Network Design.

Kyle 30 • Starting Off on VHF. WA1GEK 32 • Learning - The Radio Code if You're Over 30. W1EZT 34 • A Review of the Heathkit SB-110A. Matthew 60 • 1296 Megacycles - 1968.

K2TKN 42 • The VK3ATN Moonbounce Rhombic. W2NSD/l 44 • K2US: 1968 Ham Radio Expo.

WB2DLW/K3AFW 48 • Appliance Operators - Please Turn Page. WA4WAI 59 • Six Meter Transceiver. W2AJW 62 • Rejuvenating Old RTTY Ribbons. W5AQN 67 • Two Sidebands From the Tower. W4KAE 70 • Getting Your Higher Class License - Part 6 - Transmitters. Staff 74 • The Care and Feeding of a Ham Club.

W5NQQ 86 • Tables of Electronic Symbols for 73 Contributors. 94 October 1968 (#97) • A Collection of Thoughts on Receiver Design - Tips for the builder. WB6BIH 6 • 3 Tube Super-Het Short Wave Receiver - Performs like six tube hearing aid. W6ELJ 14 • The MO Receiver - This one will have you burning the midnight oil. K5WYG 30 • Project Facsimile Antarctic - Morale booster in the cold Continent.

K6GKX 28 • A High-Performance Receiver for 2 Meters - A VHFer's dream receiver. W2HUX 30 • Ham Workshop - The bare essentials to work on the gear. W0PEM 38 • New Life for an Old Circuit - Reviving the Yackar VFO. Thorpe 40 • VHF RF Noise Suppression - Mobile noise, good tips for HF too. K6ZFV 44 • Reviewing the SR-400 - Hallicrafters la test transceiver is great. W2NSD/1 48 • FET Converter for 50 MHz - 6 meter converter that works.

WB6YVT 52 • Neutralization - What's neutralization all about. K6EAW 56 • Advanced Class License Theory Course - Part 7 - More on transmitters. Staff 58 • More on Receiver Blocking - The Pro does a follow up on a previous article.

K6KA 72 • Regenerative Detectors - How they work. W1EZT 76 • The Q-Q Meter - The measurement and importance of 'Q'. WB6IBS 82 • Save That Cordless - An untapped source of parts for the shack. W3GKP 88 • 2 Meter Ground Plane - Never underestimate the ground plane.

WB6BIH 91 • Improving Stability in Older Receivers - Good tips on making them solid. W6NIF 94 • Care and Feeding of a Ham Club - Part 4 - Public opinion.

W5NQQ 98 • 6 Meter Ground Plane - Novel construction idea. W8JZY 102 • VHF Monitor - Keeping in touch with the group. W4KAE 104 • Simplified dB Leveling - ALC-AGC Circuits.

W2DUD 106 • FMing a VFO - FM doesn't have to be crystal. WA6UFW 110 • FET Pre-Amplifiers - Boosting receiver performance. W2EEY/1 112 November 1968 (#98) • Computer Card Transmitter - Plug in components. K1EUJ 6 • Crystal Filters - The heart of SSB. W3RET 12 • Trouble Shooting Solid-State - Modern day problems solved. K3PBY 16 • IC Frequency Counter - Easy to build counter for ham applications. WB6IBS 20 • C.V.

Transformers for Ham Applications - Keeping the voltage constant in the shack. WA9CQN 28 • A Space Communications Odyssey - It isn't going to be easy to keep in touch!

K6BW 32 • Surprize in the Skies - Pulsars. What are they? W1EZT 36 • Using Thin Wire Antennas - Fooling the landlord. W2EEY/1 42 • A 7 MHz Transistor Transmitter - An all-transistor rig for 40. WA6JND 50 • Double-Conversion of the BC348M - Surplus receiver made over for SSB. VU2TV 54 • The Gentrac - A do-all test set for receivers. W6AJZ 58 • Harness your Wiring - A professional wiring job for homebrew.

K5LLI 66 • Copper Wire - The forgotten component. W1EZT 70 • Who Says You Can't Take it with You? - College days are here again. WB6ABM 76 • The Thermistor - Temperature measurements. WB6BIH 78 • Using SCR in RTTY Series-Wound Motor - A short-short story.

W8NSO 82 • New High Voltage Transistors - A list with properties. K3VKC 84 • Project Facsimile Antarctic - Part 2 - Choosing Miss Antarctica. K6GKX 86 • Are You Really Ready for the Next Emergency? - A series of tornados strike. W0DDW 88 • Advance Class License Study Course - Part 8 - Transistor principles.

Staff 92 • Ipecac Works on LIDS - Hoo-boy, that smarts! K1YSD 102 • Instant Drilling Rig for Grounds - Water power drill. WA4VQR 108 • Care and Feeding of a Ham Club - Part 5 - More on money raising. WSNQQ 118 December 1968 (#99) • Using the First Ham Integrated Circuit - Includes several useful circuits. W6DNS 6 • Mouse Tunnels - Hiding the wiring. K6HKB 12 • Circular Modulation Monitor - A new scope. WA9IGU 14 • The Mini-Square - Square wave in miniature.

WB6BIH 16 • Add-On FM Test Set - Simple to complex in easy stages. K9STH 18 • The Elusive H Parameter - Not so elusive now. WB6BIH 20 • Zero Temperature Coefficient VFO - Sure stability. W6WQC 24 • 75 Meter DSB Rig - A step in the right direction.

W3KBM 28 • A Novice FET Converter - A good building project for the Novice. K6DBQ 36 • Transceiver Review - Photos and information about the transceivers now available for Christmas. Staff 40 • 30 Watt Transistor Transmitter - All transistorized! W5PAG 46 • Care and Feeding of a Ham Club - Part 6.

Do something interesting. W5NQQ 52 • Getting Your Higher Class License - Part 9. More on transmitters. Staff 56 • Christmas Gifts for Hams - Gifts under $25. Staff 72 • Three Black Boxes - What constitutes a station.

W5EHC 82 • Facsimile and the Radio Amateur - What is facsimile, and how to do it. K6GKX 84 • Why SSB? - Required reading how SSB is different.

K3PUR 86 • Limitations on Antenna Reciprocity - The answer to one way skip? WA4UZM 92 • Index to Articles Appearing in 73 in 1968 - Cumulative index. Where to find it. Staff 98 January 1969 (#100) • The Suppressor Compressor - The neglected grid.

W3KBM 6 • Putting the HW-12 on 160 Meters - With the new rules this is important. W8FGB 12 • Tuning a Parasitic Beam - This can really be fun. W1EMV 16 • Does Your Linear Need Help? - This could solve the problems.

W9VEY 22 • Some Thoughts on Voltage Control - A subject of some importance. VE4RE 24 • Solid-State Monitoring - A Heath modification of merit. W6JDD 26 • The Two Meter Transistor Transmitter - Plus one tube. K5WOR 28 • The Yasme World-Wide DXpeditions - Starting with Danny.

Yasme 32 • The LC Power Reducer - Power reduction under same load. W2EEY/1 38 • Why Ham RTTY - Verrry interrresting. WA8DCE 42 • Panadaptor/Spectrum Analyzer - How to lose friends by being honest. W6DTR 44 • The Six Net - Transistorized receiver. W5JSN 48 • The Operating Console - A place for everything in its place.

W6GDP 52 • RTTY Auto-Start - Why monitor? W6ORG 56 • Oscillator Frequency Shift Calculations - Calculating drift. WA6DPD 58 • A 10 Minute 40 Meter Rig - On the air in a hurry. WB2YOJ 62 • UFO Interest - Not restricted to hams. K6MVH 70 • Quad and Easy QRP - Low-power can be fun. WB2YRQ 72 • Full Sequential Switching - Using simple relays. G3KPO 74 • Drake R4A and T4X - Not new, but still great.

WB4EFA 76 • Operating the Two'er - Some hints for making it better. W6BLZ 78 • The S.O.B. - Sightless Operator's Bridge. WA5SWD 82 • Getting Your Advanced Class License - Part 10.

The last of this series. Staff 84 • Care and Feeding of a Ham Club - The last part of this series. W5NQQ 96 • European VHF - They use the bands too. DL5QN 100 February 1969 (#101) • A Fast Scan Vidicon in Slow-Scan Camera - More on ATV. K7VZZ 6 • A Cheap and Simple Linear Amplifier - More watts per dollar.

WB2PTU 10 • The Beatnote Basher - A selective audio filter. WB6JXU 12 • The Unijunction Transistor - What they are, and what they do. VK3ZRY 14 • What's Out There - Probing the universe for life. W1EZT 24 • Velcro - A new material with ham potential.

K3AQH 32 • TVI Suit - Ham sued for one million. Staff 36 • >Nikola Tesla - The master of electrical energy. Elkhorne 38 • Go Mobile - Some pointers for new mobileers. WB6ACM 58 • Getting Your Extra Class License - Part 1. AC-DC theory. Staff 60 • Is it Cold Down There?

- A common question in the Antarctic. K6GKX 74 • Ampheham - Building project for odd connectors. Staff 76 • Be a Good Ham, Not a Bad Egg - The fine art of lending and borrowing. W5NQQ 80 • 73 Visits FAA Center - The electronic complex for aircraft control. Staff 82 • CW Only Here, OM - CW can be fun. W6EKN 90 March 1969 (#102) • Modifying the TCS Transmitter - A useful piece of surplus gear. K3UUL 6 • A $4 Compressor Pre-Amplifier - More speech for less money.

W2EEY 10 • Reactance or Impedance - Answers to a lot of old questions. K9ZPZ, K9DRB 14 • Weather Snooper - Eavesdropping on the aircraft WX frequencies. K6ZFV 18 • The Charmin' Keyer - The solid-state keyer. W9HXM 22 • Amateur Radio Knows No Borders - Saving a life across the Iron Curtain. Staff 32 • A Better Balanced Modulator - A good project.WA1FRJ 36 • Adjustable Power Supply - A must for building projects. WA0ABI 40 • Save Your Money - Salvaging transformers. K6GKX 42 • Transistor Oscillators - A variety of circuits, old and new.W9ZTK 44 • Heath HW-18 Review - 160 meter transceiver.

W8QUR 50 • Cool It - Blowers to cool the tubes for UHF. K9CNN 54 • A New Support for That Beam - Using phone pole. K1MYV 56 • The Case for the Half-Wave Feed Line - Care and feeding antennas. W5QRJ 58 • Putting Creativity to Work - Making household articles work in the shack.

VE3BUE 62 • The Lamb Dyer - An amusing story. WA1ABP 64 • IF Alignment - A simple chart method.

K8ZHZ 65 • Charlie's Broken Dream - Don't be a 'Charlie'. WA8VST 66 • Kluge Tube - Resurrecting an old power amplifier, maybe. Staff 68 • For Those Who Think Small - And other tips. WA4VQR 73 • Surplus Conversions - Where to find conversion information.

Staff 96 • Surplus Advertising Catalog. Staff 97 • Getting Your Extra Class License - Part 2.

Amplifiers.Staff 128 April 1969 (#103) • Dual-Channel Oscilloscope Pre-Amplifier - Convert your scope to a $1000 dual channel job. W3ZZY 6 • Simplest RF Pre-Amplifier - Simple, new, very effective. W1EZT 10 • Education and Ecstacy - Reprint from LOOK Magazine re the 'magic' of ham radio. Leonard 14 • Push-to-Talk - Converting the Two'er for this valuable function. VE3ETJ 16 • Variable DC Load - For testing power supplies and things like that. You never know.W2AJW 18 • Single-Side SWR Bridge - Complete with plan for etched circuit board. WA5SWD 22 • 100 kHz Marker Generator - Used to mark frequencies up to the 144 and 220 MHz bands.

W7CJB 24 • One Technique to Avoid That Routine QSO - Desperately needed information for many phone and CW ops. W6EUV 28 • Minimum Cost Silicon Semiconductor Survey - Long article, but transistor buffs should flip over it. Zaranski 30 • Heath SB-610 Monitor Scope Modifications - Makes a good piece of gear even gooder. You need one. K6SDE 42 • VHF FM Station Control - Switches two channels in each of two bands. WA7EVX 46 • A Simple Portable Rig for Six Meters - Two transistors and one IC modulator and head for the hills.

WB6BIH 48 • Using FETs in Burst Generators - Now what in the devil is a burst generator? K3VKC 50 • Two Meter Converter - For the Swan 250. Or any other receiver or transceiver. K3VLQ 52 • VSWR, An Outmoded Parameter - Adding fuel to the fires of controversy?

Or calling troubled waters? VE2AXQ 55 • Testing the Drake VHF Converters - The new Drake converters for six and two are grrrreat! WlEMV 56 • About Loading. Which Loads What? - Can an antenna really load a rig? Or does the rig load the antenna? Staff 58 • 0 Cycle Filter - The ultimate in selectivity.

LX5SM 60 • Camp Albert Butler - You've read the ads. Here is what it is all about. W4UF 68 • Extra Class Study Course - Part 3 - Part 3 of 10 parts. Staff 70 • Learning the Morse Code - A new and much faster approach to the code.

K9AAU 85 May 1969 (#104) • Who's Who in Amateur Radio - Celebrities in our ranks. W8GI 4 • Stacked Gamma Matched Turnstile - About 10 dB on 2m, omnidirectional. WA9LPC 8 • VHF Vacation Special - 2m slot antenna made out of aluminum foil.W2ZRX 10 • S-Unit Attenuator - For calibrating S-meters and antenna gain. WA5SWD 14 • In the Beginning - Not for serious amateurs or heat patients. K1YSD 20 • Don't Kill Your Generator - Just wound it a little, maybe. W1EZT 24 • Working DX Without Six Elements - Persistence and sneakiness substituted for power.

K5PAC 26 • The Short-Vee Antenna - 10-15-20m, 56' on a leg and it works. W3FOJ 28 • The Little Wonder - 80-10m antenna. Looks a lot like the Joystick.

W5ZBC 30 • Easy Tuning of the Quad - Multi-element quads can be awfully difficult. W4AZK 32 • The Antennascope - An effective tool. It's okay if you know how to use it. VE3CEA 36 • Two on Top - 80m vertical which tunes both ends of the band.W6AJZ 40 • Measuring Antenna Gain - You don't just ask around for signal reports. W2EEY 42 • QRP - A New World To Conquer - Where 1.000 watts is a full gallon. W6TYP 46 • Report on The Galaxy 550 - Great new transceiver.Read all about it.

W6AJZ 48 • Feeding & Tuning Three-Band Quad - Boomless quad, novel approach. WA4VWY 52 • To Patch or Not to Patch - Here's the latest news on patching. W5LHG 56 • Direct-Reading SWR Indicator - Tired of switching back and forth?

K3WRW 60 • Asymmetrically Feeding Long Wires - Strange things happen when you move the feed around. W2EEY 62 • Tests the James Research Units - And finds them outstanding and mild. WlEMV 13 • Compressed Vertical for 160 - If you have room for a 120' tower pass this. W6FPO 70 • Class A Transistor Amplifier Design - Seven steps to total and complete success. WA5SWD 72 • $4.98 Novice Special - Why spend more for a nice 15m antenna?

WA7CSK 74 • How to Fly Your Kite - Simple 160m antenna for Field Day or expeditions. E14R 77 • In Search of a Better Angle - Angle-of-radiation is of critical importance. K9YOE 78 • FSK Exciter - Another bone for the RTTY fiends. W4LLR 84 • Telephone Beeper - Handy gadget for the new phone patch laws.W6BLZ 88 • KW Dummy Load Cheap - Start using this instead of your antenna.

WB2PTU 92 • Mini-Bomb - Another of his little 10 kW linear amplifiers, almost. W0SKY 94 • DX From DL Land - What's it's like over on that end. DL4BR 96 • Phonetics for the Pileups - How to get your call letters through the mess.

KH6IJ 98 • Extra Class License Course - Part 4 of the Extra Class Study Course. Staff 100 • Economy Chronometer - Some hams are pretty doggone cheap. W0EDO 118 • 4x150 Socket - Another shortcut for the cheapskate ham.

WA3AQS 120 • All-Band Curtain Array - 160-10m and only 112 feet long. VK4SS 122 • How to Tune a Circuit - Figuring capacitance, and parallel capacitance.

K5LLI 123 • Mobile Antenna for Vacation USA - Not much trouble and works slickeydoo. WB2WYO 130 June 1969 (#105) • New Ways of Generating Microwave Power - New solid-state devices you should know about, probably. K3PBY 3 • Modification of VHF Transmitters for CW Operation - Moonbounce?

You may need to use CW. K1OYB 12 • Mondo Hamme - Read slowly, this may be injurious to your health. K1YSD 14 • Straightforward SSB for 6 Meters - Build this little beauty next week. VE4RE 18 • The 432'er Solid-State - Bill Hoisington gets you on 432 the fast easy way. K1CLL 24 • Six Meter FET Converter - You are not still using tubes in your converter?

W6RET 34 • Compleat AVC - Showing how much can really be done to improve AVC systems. W8RHR 36 • Leaky Lines - Random thoughts by a random thinker. K2AGZ 38 • Field Day Fever - Your Field Day should only work out as well. VK4SS 40 • A Field Day to Remember - Field Day can be loads of fun; give it a try this year. W8BVU 44 • Sunspots? Who Need's 'em for Six Meter DX?

- OK, so you can work 'em without sunspots too. K7ALE 48 • DX Desk - DX ramblings, WTW news, and other rot. K2AGZ 54 • Whipping Two Mobile - Make your own whip for two meter mobile. K6ZFV 58 • Design of UHF Tuners Using Silicon Transistors - Some good ideas for you UHF'ers. Sir 60 • Review of the Heathkit IT-28 Capacitor Checker - Heath does it again, as usual. W0HMK 64 • How to Convert Your Receiver for Six Meters - Nice little converter for the 75A2, or any other receiver.

W8RHR 66 • Forty, Twenty, and Two - Nice simple vertical antenna using dielectric pipe unions!WA8IYL 70 • Review of the Caringella Compressor/Pre-Amp - We like it when readers review new equipment. W2EEY 71 • ATV Video Modulator - One transistor is all it takes.

W6ORG 74 • VHF, FET, More Of - Pre-amps for 144 end 432 MHz, like for ATV, you know. K6KTP 76 • Simple Scope for RTTY Monitoring - Good news for all you 'ratts. W6JTT 78 • Curtain Roads, Coat Hangers, and Control Links - VHF and UHF antennas from the closet. K9STH 80 • Facsimile and the Radio Amateur - Part 2 - Answers to questions about fax. K6GKX 84 • Extra Class License Study Course - Part 5 - We try to make it easy for you to get that ticket.

Staff 86 • Soft Solder Construction of Cavities and Lines - Makes those VHF machining jobs a cinch, almost. WA9VFG 102 • Police Converter - Enjoy the thrill of listening to police calls, if it isn't illegal. K0VQV 104 • The Neglected Mini Vee-Beem - Small, and works like crazy on 10-15-20m. You read it here. W0LBV 106 • Modifying a Tube Converter for FET - Makes a great improvement and doesn't cost much. W6OSA 114 • A Variable Resistance VFO for 6 and 2 - Transistors, PC board, and tuned from afar. Also very stable.

K9ALD 124 • VHF-Band Scanner - Watch the VHF bands with the ALA-10. WA8OIK 127 • Simple Converter for Slow-Scan TV and Facsimile - Ridiculously simple, if you want to know. Let's get going. W2LNP 130 • Confessions of an Appliance Operator - How to ad lib in spite of the state of the art. W3ETQ 133 July 1969 (#106) • Confessions of an Appliance Operator - This article is not for those of precarious health. K1YSD 2 • The Ancient Modulator - AM? For 160M, 2M, etc.

WB6BIH 14 • A Slow Scan Television Signal Generator - Things are really happening on SSTV. Now you can join the fun. K7YZZ 16 • Six Meter Linear Amplifier - One kilowatt for 10 cents a watt. Why not be heard? WA0ABI 20 • A New Way to QSL - Simpler..Less expensive.

ZE7JV 24 • Kilowatt Amplifier for 420 MHZ - Sneaky water-cooled final that perks away as you talk. W2CLL 27 • 4 Thirty Two'er - Converter and transmitting converter for 432.

WA3AQS 32 • CW Can Get Your Goat - Rettuesnesnon. K7TTA 36 • Rio O'Oro - DXpedition to EA9, complete with incredible frustrations. W4QCW 38 • Trouble Shooting Antennas - Clever ways to find out what's wrong from the ground. W2OLU 44 • Six Meter IC Converter - Two IC's, some tuned circuits and a crystal. K2ZEL 46 • Radio Control Revisited - Model airplanes and their modern sophisticated control. WlOLP 49 • Long Range Propagation Forecasting - Our expert explains his magic system.

Nelson 62 • Simple and Effective RTTY Terminal Unit - Two IC's, two tuned circuits, and not a lot more! W6JMM 65 • Facts and Fads - More history uncovered with negligible reverence. WlUSM 68 • An IC Audio Notch Filter - One IC, some resistors and pots, and presto. W2EEY 72 • Converting the VRC-19 for VHF FM - Another attempt to boost the FM population explosion.

W6JTT 76 • The Greatest DX of All! - Solar flare detector. K5JKX 80 • Intelligent Tube Substitution - Lovely article for tube fans. K3LNZ 88 • Passive Reflectors for Amateurs - Most of us have wondered about this. Here is the info. W7EEX 91 • Modification of the Heath HW18-3 VFO.

W8QUR 100 • Whip Antenna Add-Ons - VHF mobileers can get more gain and directivity. W2EEY 104 • Two Meter Transistor Exciter - All transistor. W6AJF 108 • Extra Class Study Course, Part VI - The new license is a snap with this series. Staff 112 • A Stable HF VFO - Transistorized PC vfo for the DX-40, or any other rig. WB6BIH 128 August 1969 (#107) • Listen In on Two-Meter FM Repeater - Two little ole transistors in this simple monitor receiver. K0VQY 4 • An FET Regenerative Receiver for 3.5 mhz and Up - Or use two FET's and have a ball on the low bands. W6OSA 6 • Multi-Channel FM Operation - Adding relay crystal switching to commercial FM gear.

WA7EVX 12 • The Case for the 5/8 wave Vertical - John makes a very good case indeed for this antenna. W2EEY 14 • The Genesis of Radio Reception - History Lesson. WlUSM 22 • An Introduction to Integrated Circuits - Let's hope that an intimate relationship results. WAlFHJ 26 • RTTY Tone Generator - Now you can mark and space up a storm.

W7FLC 32 • General Purpose Good-Bad Transistor Tester - Use less if all your transistors are in excellent shape. W0KKA 41 • A Compact Two-Meter Transmitter - 2E26 output, phone. W4UOY 42 • Measuring f t of Surplus Transistors - There are some enormous bargains around. WA1FRJ 46 • Skylines for 160, Made Simpler - 160M antennas, from A to exhaustion.

WlEZT 49 • The Triac - New gadget you should know about. K8TSQ 59 • 430-470 khz Sweep Frequency Generator - That's khz, not mhz.

This is for aligning i-f strips. WA5SWD 62 • What Do You Think? - A special 73 metaphysical feature. KlOXK 64 • Leaky Lines - Grumbles by Sam. K2AGZ 66 • Magikey -- for Automatic Didahs - Another automatic key and a good one - 2 transistors. W3SGV 68 • FM = Fun Maker - Say, are you missing out on the FM bandwagon?

K2PTS 72 • The SB100 on Six Meters - It's possible. WB4CXL 74 • Measuring the Frequency of Unmarked Crystals - Different simple ways of doing this. K1EUJ 76 • Extra Class Study Course. Part VII - There is no excuse for failing the test if you read this. Staff 78 • Now You Too Can Have A Deviation Meter - Don't deviate too much. K9STM 96 • Two Transistor 1500 Mile Transmitter - 1/4 watt super QRP rig for some excitement. K0VQY 98 • Long Circular Quads - Our cover feature for moon bounce work.

WA4KAE 101 • Measuring FM Receiver Noise Figure - Taking the mystery out of this for FM receivers. W8BBB 112 • Would You Like To Be A Broadcast Engineer? K2ULR 117 • Distress: The Amateur and the Coast Guard - What happens when an amateur passes along a distress call.

WB6UKX 122 • A Transistor Parameter Tracer - Useful, unless tubes come back again. K3PUR 128 • What Are We Here For? - Sometimes, as we tune the bands, perhaps we wonder too. W8RHR 134 September 1969 (#108) • A DX Curtain for 15 Meters - An easy 3-4 db gain for you.

VE1TG 4 • Tunnel Diodes-Theory and Practical Application - Including a one transistor solar powered transmitter. K8TSQ 8 • The Magic T - Method for running rf transistors in parallel.

Thorpe 14 • Uncle Will and News from the Poudre Valley - In dialect yet. K0DVI 19 • Basic Soldering Outfit - Good Lord! Another article on soldering! W1EZT 20 • Light Naturally Runs Down - A special Scientific American type feature. K1CLL 24 • Cable Pickup and Shielding - Keeping interference to an absolute minimum.

W2EEY/1 36 • WWV-Pioneer in Standards Broadcasting - Perhaps you've heard the catchy tune they play. WA1AAU 39 • Basic Theory and Application of Transistors - Something you have always wanted to know.

WA1FHJ 42 • Series Gate, Solid State - Clipper. K6ZFV 50 • Improving NC-300 SSB Reception - It was good but it can be very good. W1OOP 52 • AFSK Generator - Crystal controlled, using digital IC's no less. W1ESH 53 • Transistor Transmitter Aspirin - How to keep from westernizing your transistors. K0VQY 64 • Improvement of Phone Intelligibility by Base Clipping - Discussion of base clipping. Ives 68 • Measurement of Meter Resistance - Making it possible to versatilize your meters.

WA6NIL 72 • Diode-Stack Power Supplies-The Easy Way - Instant operation of the Henry 2K and other rigs. K6KA 74 • Transistor Testing Techniques - Testing with a vom without destruction. W9KXJ 76 • 2 1/2 W Transmitter - Work the world with this three transistor rig. K0VQY 78 • Neutralizing the HX-10 - Simple way to stabilize this rig. W2PQG 80 • More Taylor Modulation - Remember that AM is still going strong on VHF. DL5KS 84 • An Audio Sinusoid Generator - Two IC's.

W5FOO 88 • Capacitor Usage and Electron Flow - Where to use what capacitor and why. W0HMK 90 • What About FM? - We'll have you on FM within the year. W9VZR 96 • A Primer on Radio Propagation - If signals really do bounce, this is how it works. WA1GEK 98 • Measurement of Percentage of Modulation - Of AM transmitters. Granger 106 • Extra Class License Course, Part VIII - let's get cracking.

Staff 108 • Big Signal-Good Looks - 3-400Z kilowatt Linear. WA7AIA 124 • A New Vidicon Camera for ATV - Isn't it time you tried your hand at ham TV?

W8VCO 129 • Two More Transistor Testers - Handy jf you by your transistors by the bag full. W9DJZ 133 • The FETCompressor - Audio compressor using two FET's. WA0IOC 139 • The Mike Mixmaster - Just like a broadcast station. WA2YRF 140 • The T-60 Works Just Fine - Part XVII of our Novice Instruction Manual. WA1GEK 142 • Leaky Lines - Not to be confused with columns in other magazines. K2AGZ 144 • A Unique RF Plate Choke - Actually it isn't really all that unique.

W6RET 147 • Modification of the ac Input on the SB-200 - Published by popular demand. K3KMO 148 October 1969 (#109) • A Super-Gain Antenna for 40 Meters - Nine db on 40 meters might be called 'super'. W4NVK 8 • DX Corner - WTW reports and other DX jazz.

K2AGZ 12 • FET Chirper - Signal source for peaking converters for optimum signal/noise. K6QKL 20 • The Inside Info on Alexander Graham - Or how the telephone really works. W2FEZ 24 • Leaky Lines - Similar to 'Grumbles,' but by a licensed amateur, not a CB'er.

K2AGZ 28 • Scope Calibrator - Gadget you can build to improve your scope. WlOLP 32 • Vidiots That Have Known Me - Sense of humor test. If you flunk, go back to 11 meters. K1YSD 34 • The Protector - Protects your gear from sudden line voltage surges and interruptions. WA0HKC 40 • Slower Tuning Rates for Older Receivers - Just like band spread. W4RNL 42 • Positive Identification of Calibrator Harmonics - Keeps you off 6950 and other poor DX bands. K5LLI 46 • Adapting AM Transmitters to FM - Good Heavens, is everyone going on VHF FM?

WA4UZM 50 • CB Sets on Six - No need to junk that CB rig when you get your Tech ticket. WB2FHW 52 • Proportional Control Crystal Oven - You need this sort of thing for moonbounce work and such. W2CLL 54 • A Crystal Filter Phasing Control - Look at the i-f response in Fig.

10 and be amazed. W2LT 58 • Grounded Grid Filament Chokes - You need these for linear amplifiers. W2IK 62 • Equipment Cabinets with Style - Make it look commercial.

W2OLP 64 • VHF-FM: Part I - Advantages and practices. When are you going on FM? WB2AEB 66 • Bring Back the Q Multiplier - Invaluable for CW, notches out AM carriers, etc. W8RHR 68 • Activation in VP2 - Anguilla Island activated. VP2AC 70 • The CR Beam - Two meter corner reflector beam.

WA4FDQ 73 • The ARRL Board and Amateur Radio - An ex-ARRL Director evaluates the latest board meeting. W7ZC 76 • A Cheap and Easy Power Supply - For a sideband transceiver. K4FQU 83 • Extra Class License Course, Part IX - Modulation. We'll have lots of arguments on this one. Staff 86 • Ham Jamboree - Scouts hit the ham bands every October.

WB6IZF 108 • Operation Cat's Paw - Whimsy. W7ZC 116 • Knight V-l07 VFO for Six and Two Meters - Test report by a happy user. K6GKX 123 • Careers in the FAA - Get on the government payroll. W6JTT 124 • Youth Forum - Teenagers, arise!

WA1GEK 132 November 1969 (#110) • An Approach to Six-Meter SSB - Using an NCX-3 or other SSB transceiver. WA1FRJ 6 • IF Notch Filter - For the last word in selectivity for your transceiver. W2EEY 14 • Calibrate That Homebrew Dial - Accurate calibrations on any band. K9STH 18 • Slow Scan Color Pictures - Using additive synthesis. WA2EMC 20 • A Remote VFO for the HW32A - Split frequency operation simplified.

AP2MR 22 • Cheap and Simple for Six - Three transistor PC board converter. WB6BIH 25 • The Mismatched rf Transmission line - High SWR makes no difference at all, hardly. W5JJ 28 • BKX Bridge - RF bridge modelled after the General Radio bridge.

W8BKX 32 • Religion, Politics or Sex - And other QST-approved QSO topics. W1DIS 40 • VHF-FM: Part II, Mobile Installations - Another chapter in our effort to get you on FM. WB2AEB 44 • The Umbrella Antenna - Efficient antenna for 40-80-160M.

W2EEY 46 • Solid State 432'er Transmitter - Three transistor converter. K1CLL 50 • Fascinating Fundamentals I: Electrostatics - Elektron is Greek for 'amber.' W2FEZ 56 • Apollo TV & Radio - Details on the radio end of the moon trip. WlFJE 58 • The Receiver - The Overlooked Piece of Test Equipment - Handy.

K1ZJH 60 • A Voltage Sextupler Power Supply - QST would never publish anything this Sexy. W5NGX 62 • The Unikey - If you are a CW man, this'll get you. K9MLD 66 • Transistor Power Supplies - Robbing power from the rig or receiver. K6KA 72 • Bias Design Without Curves - Transistors just won't make it without the right bias. WB6BIH 74 • FM Receiver Tweeker - Alignment gadget for FM receivers. K6UAW 80 • A Mate for the Swan 350 - Adapting the Swan TCU unit to the 350. WB2MPZ 82 • The Ball of Wax - A Calibrator - 200- 100-50-25 khz calibrator on PC board.

W6GXN 84 • Electronic Variac - Using a Triac. K9JSC 88 • SB-33 Modification - Adding a Calibrator, CW coverage, etc. W4MNW 90 • Call Lettering Lunacy - Being about broadcast station call letters and such. Moshcovitz 94 • Extra Class License Course, Part X - You should be able to pass the exam by now. Staff 98 • SBE Improvements Made Easy - Bunch of ideas for the SB-34 owner. W6JDD 122 December 1969 (#111) • Quick, Easy, Dependable Transistor Diode Checker - For those who like checkered diodes.

W6ICC 6 • Did Samuel Morse Really Invent the Telegraph? W2FEZ 10 • Combination Dummy Load/Attenuator Network - Also doubles as a hot plate for your coffee warming. W2EEY 14 • Tuned Filter Chokes - The Easy Way - Can your filter chokes carry a tune? W2OLU 18 • Hey OM - You've Got Carrier There - 'Drop dead, you knit-picker.' W4NVK 22 • Bandswitching the Swan-250 and TV-2 - For both six and two meter operation lickety-split. K3LNZ 26 • Cheap and Easy Selectivity - A CW audio filter for under $10.

Cheap enough. W5INU 28 • VHF-FM - Part III: Hand Held Portables - Part 3 in our effort to brainwash you in to trying FM. WB2AEB 30 • Sunspots and the Ham - If you can't beat 'em, join 'em. WB2VFX 32 • SSTV - Lecture at the International Congress of Amateur Television. SM0BUO 34 • Amateur Radio in the Classroom - Drives the kids right out of their everlasting minds. K0HUD 40 • The Galaxy RV-550 Remote VFO - Test Report from an excited and happy user.

W6AJZ 48 • Calculation Made a Little Easier - Stuff our dumb high schools should have taught. W1EZT 50 • Universal Dual-Frequency Crystal Calibrator - Using those new IC circuits. W2EEY 58 • Versatilize Your Transceiver - Adding incremental tuning, a blessing in no disguise. VE3ECU/W0 62 • Transistor Class B and C Power Amplifier Design - Slide rule lovers, arise and rejoice. An article for you! VK3ZRY 64 • Two for Mobile - Power supplies, not a love story.

K6ZFV 70 • Amateur Microwave Frequency Meter - 1 to 10 ghz. Simple, but necessary test equipment for ghz tinkerers. K1CLL 72 • Audio Organizer - Nice companion unit for the station transceiver.

WB2WYO 77 • Converting a CB Transceiver to Six Meters - What else can you do with them? WB6BIH 78 • Extra Class License Course, Part XI - Oscillators. Staff 82 • Topographical Maps for the Radio Amateur - For transmitter hunts, and other hammy applications. W9VZR 102 • Fascinating Fundamentals III: Magnetism - An irrelevant dip into history. W2FEZ 10 January 1970 (#112) • Single Sideband AM-FM Modulation System - Using easily available filters.

W2BSP 4 • The Transceiver Companion - Does everything but change the baby. W6AJZ 10 • A Simple Bench Power Supply - For those readers with simple benches. ZL2AMJ 22 • Slow Scan Color Transmission - See cover for illustration of results. Tarr, W4UMF 28 • Fascinating Fundamentals: Volta and His Piles - Zap! W2FEZ 36 • The Manuscript Game - Another construction article flushed out. K6MVH 40 • Base-Tuned Center-loaded Antenna - Vertical antennas are not basically bad.

W2EEY 42 • Quazar QRP 40 Meter DSB Transmitter - Solid state to boot. WA5WWN 46 • Simple Compact Six Meter Bandpass Filter - Cuts down your channel 2 DX. WA5SWD/6 48 • Low-Cost Electronics: Japan's FM Invasion - FM Changes from surplus to imports. K6MVH 50 • Mobile CW - On the freeways, no less! K6RA 54 • Extra Class License Course, Part XII - Semiconductors. Last chance to learn this. Staff 57 • A Pre-Amplifier for Ten-Meter Bands - Also works on CB, but don't tell anyone.

WA3HMN 76 • Proper Use of Silicon Rectifier Diodes - Diode poppers, arise stamp out this stuff. K3DPJ, WA3ACL 77 • Converting the 4CX1 000A into a Lamp - Excellent application for your spare tubes.

K3QKO 80 • Facsimile and the Radio Amateur - Are you missing out on FAX fun? K6GKX 82 • Tunable Solid State IF - 28-30 MHz i-f for use with UHF converters. K1CLL 88 February 1970 (#113) • Fascinating Fundamentals - The Terrible Jar at Leyden. W2FEZ 14 • 18 in.

Dipole on 15 Meters - February Fool article? K9LGH 24 • High Performance Converter for 6 - 73 drags its heels into the 70's with a tube. WA9HES 30 • From Breadboard to Printed Circuit - The Easy Way - And it is easy, for once. K1AOB 36 • The Camper: Mobile and Portable - Enradioifying the VW bus. WA9EHE 40 • So You Think You Have Troubles?

- Cutting blind ham's antennas for fun. W1EMV 43 • Frequency Synthesis - The Modern Way - Special book-length feature for FM fiends. W2EUP 44 • Encoding and Decoding in FM Repeaters Part I - Encoders for Subaudible, Tone-Burst, or Whistle-On Use.

W6ZCL 72 • Encoding and Decoding in FM Repeaters Part II - Tone Decoder for Remote Switching Applications. K6MVH 80 • Encoding and Decoding in FM Repeaters Part III - Setting Up the Tone-Burst System. W6TEE 82 • How to Visit Foreign Countries - Using ham radio to make travel funner. W2NSD 84 • The DX-35 Revisited - Exciting development for chirp haters. W2AOO 86 • Panoramic Receiver for VHF - For 2 meter busybodies. I1SL0 88 • Variable-Impedance Mobile Mount - Out, damned reactance! W1EMV 96 • Lossy Transmission lines - A shorty short.

KH6IJ/1 97 • Extra Class Study Course, Part 13 - RTTY, FSK, filters and other such trivia. Staff 98 • New Linear IC's for the Ham - Cheap-new-hot-have fun. WA4KRE 115 • The Glop Will Get You If You Don't Watch Out! W2ELU 126 • DX as seen by - Cartoon feature. W6EIF 130 • The Micromitter - World's cheapest rig. WA3GGH 131 • A Simple Integrated Circuit Q-Multiplier - Makes the CW band ten times wider.

W2EEY 134 • Quick Stop and Reversing for Antenna Rotors - Whipping antenna whip. PY2AUC 137 March 1970 (#114) • Extra Services From Your Grid Dip Oscillator - Like checking crystals, tuning FM receivers and such. WA4UZM 18 • Reverse-Current Charging - Turns out you really can recharge flashlight batteries! K8YUC 20 • A Poor Man's Frequency Meter - Combines surplus from two services.

W6YAN 24 • Professional PCs From Roll-Your-Own Negs - Eliminates drafting, camera work, and darkroom entirely. K6MVH 29 • How I Read The R.O.' S Handbook & Found Happiness - Instant profundity.

Johnson 36 • A Look At Amateur FM Standards - Or, how do we get out of this mess? WB6DJT 38 • An Inexpensive RF Wattmeter - Surplus meter for those too cheap to buy a regular wattmeter. WB4MYL 43 • A Remote Multifrequency Oscillator For Surplus FM Units - Drive people crazy on lots more FM channels with this. W2ACM 44 • Add Spotting to Your VFO - If your VFO is unspotted. K8BYO 49 • Towards an Ideal Solid-State I-F For Amateurs - Closing in on the state of the art with Bill Hoisington. K1CLL 50 • Ham Exchange - Visiting foreign amateurs makes trips more enjoyable.

WA2ELA 58 • Super Sixer - Heath wouldn't recognize it. WA3AQS 60 • Bob, Bob, Bobbin' Along - Special April feature article. Well, it's almost April. K1YSD 62 • The Dip Light - A grid-dip meter with no grid and no meter.

VE3ECU 68 • 73 Checks Out The Kris Scanning Receiver - Snazzy. Staff 70 • Two Conversions For The Motorola 41 V - Part 1: AC Power Supply. K9PKQ 72 • Two Conversions For The Motorola 41 V - Part 2: 6 to 12V Filament Conversion - Here's the surplus, if you want to make an issue out of it. W6YAN 74 • A CW Monitor - Using a 98 cent audio module, you cheapskates. WB2GQV 76 • The Logical Approach To Surplus Buying - Here's your key to fun with those surplus logic circuits. Kyle 80 • Converting The Sonobuoy to a 2W FM Rig - Two meters. Why not have some fun with this one?

W1BYX 96 • Easy Diode Testing - Checking out those bargain diodes. K4JK 97 • Turning The AN/GRC-9 Into a Novice Rig - 2-12 MHz transmitter-receiver. W6JTT 98 • Extra Class Study Course, Part XIV - Measurements.

Staff 104 • VHF-FM And You - Part of our Encyclopedia of FM; a good part. K9STH 118 April 1970 (#115) • A Noise Blanker That Works - As opposed to that crummy one in Brand X that doesn't work. And can be added to your present receiver easily. W8RHR 17 • Hot Carrier Diode Mixer Converter - This is not an April Fool article. WA6NCT 20 • Examining FM Repeater Operation - History of repeaters, ARRL involvement, and legal problems. WB6DJT 28 • A Repeater Controller - Tone generator, timer, identifier, the lot. WA4YND 34 • Understanding the Carrier Operated Repeater - Some of them take a good deal of understanding.

K6MVH 41 • Evaluation: Standard 2M FM 12 Channel Receiver - Okay. W6QGN 46 • 7/8 Wave Mobile Antenna for 2 Meters - Why have a puny signal when you can have a mediocre signal. W2EUP 50 • How Do Ham Stores Decide Their Trade-In Figures? - $200 for your S-38? W2CFP 55 • Beryllia- The Lethal Refractory - Worse than cyclamates. WB2PAP 58 • Getting Your Extra Class License, Part XV - Spurious radiation is covered. Staff 62 • A Work Session On The Wichita Repeater - If anything can go wrong.

W0DKU 78 • In expensive Semiconductors for the Ham - Giant Motorola ad that we paid for. WA7KRE 81 • Renovating Surplus Meters - Making new scales for meters, calibrating, and like that. WA0ABI 84 • A Bias Regulator for Linears - Simple gadget makes Class B linears practical. ZL2ANG 86 • High Performance I-F and AGC System - Particularly for CW and SSB. ZL2BDB 89 • Single Sideband on the All-Wave Radio - One transistor BFO, and no connections. W7CSD 94 • Vacuum Tube Load Box - Invaluable for testing power supplies. Ashe 96 • Repeater Directory - Special book length feature with photos, coverage maps, and access data.

Staff 99 • A Word About Repeaters - A special featurette. WB2AEB 100 • The Fine Points Of FM Operation - Getting on frequency and other fine points. WB2AEB 121 • How To Megger Your Antenna - It's not dirty. W2EEY 125 May 1970 (#116) • 73 Comments on FCC's Proposed Repeater Rules - Passage as proposed could be catastrophic.

Staff 20 • What Will Become of CW? - What became of the passenger pigeon? W5TOM 30 • FM-AM Transmitter-Receiver Aligner - Two transistors, any band HF or VHF, simple, useful. W3JKL 34 • 5/8 Wavelength Verticals - Twice as good as a Quarter-wave.

WA0NGV 36 • The Intelligent Use of Two Meters FM - It is possible.K1ZJH 40 • Plus 10 dB - The October '68 article was better illustrated. W2OLU 46 • A Ham-Style Burglar Alarm for the Car - First take two sticks of dynamite, then. K2JLD 48 • Power Supplies From Surplus Components - Cheapskates' power supply manual. WB6BIH 50 • RF, Riviera Style - Quieting Buick's super noise generator.

K9BDJ 58 • Keep 'em Cool In KPO Cans - Cheaper than blowing your cool. G3KPO 60 • Towards The Ideal Solid-State I-F, Part II - Filter, Converter, AVC - State-of-the-art for VHF. K1CLL 62 • Epoxies for Electronics - Cold solder joints become respectable at last. W9KXJ 73 • FET Pre-amplifiers For VHF Operation - 20 dB gain = 100 times the power!WA4WDK 74 • Educated Idiot Lights - Like the oil light indicating your engine just burned out. Holford 78 • Postage Stamp Transmitter for Six - Shades of Dick Tracy. K1CLL 80 • Getting Your Extra Class License, Part XVI - RF power amplifiers.

Staff 88 • The 27-Minute Mobile Noise Limiter - If you build it right, it may last even longer. W7SOH 102 • A Low -Band Police Monitor - For emergency, CD, or SDS use. W6JTT 106 • A Mobile CW Transmitter - Gives a driver something to do with his two free hands. W6BLZ 108 • An FM 'Best Buy' - You have an FM ed itor and you have FM articles. WA7EMM 112 • Science Fairs: Science Education - By the Science Editor of Radio Today. Staff 116 • The Wichita Autopatch - Telephone through a 2m FM repeater (while you still can).

W0DKU 118 • London's Science Museum Demonstration Station - GB2SM. Ellison 125 • Try Bigger Knobs For Better Operating Performance - Tiny knobs cramp your style.and fingers. WB2ICV 129 June 1970 (#117) • A Practical DDRR Antenna - Expensive, difficult-to-build mediocre antenna. W6WYQ 20 • VFO Circuit - In case you are tired of crystal control. K0HVK 36 • The Low-Noise Antenna - High noise you're looking for? WB6JNI 39 • Experimental Remote SWR Indicator - Experimental means we think it might work.

W2EEY 41 • The Little Wonder: Mark 11 - Proving again that almost anything will radiate. W5ZBC 46 • CW Can Be Fun (With the Ord DK-1) - if you know the code. Staff 48 • Two Receivers From One Antenna - Without suckout (tsk). WA6UFW 49 • Factors in Coaxial Cable Loss - Like temperature and frequency. W9KXJ 50 • Improving Trap-Type Vertical Antennas - By adding an element.

W2EEY 52 • Measuring Incident and Reflected RF - It's the difference th at counts. VE7BS 56 • Government Surplus Straight from the Horse's Mouth - Hay, Hay!

WA9ANW 58 • QRP - 40m with 40 mW. WA3JBN 62 • Ground Support for the Powder Puff Derby - Public service and politics. W7ZC 64 • Coax Adapter VHF to BNC - For 75 cents. W9MEV 73 • The Sly Beam - 32 elements on 2 meters. ZL4TAH 74 • Three Unrelated Articles; Installing the Swan 250-C Noise Silencer; Measuring Rf Output; Useful Cable Clamps.

WA6CPP 80 • 1/4 Wave Top-Loaded Mobile Antenna - F or 20 meters. W5AZE 83 • 11 Element 2 Meter Circular Quad - 9 dB forward gain.

W4KAE 86 • The 633 - For 10, 15, & 20 meters. ZL2ASJ 92 • 73 Tests the Grundig Satellite Receiver - Tunes in CW, SSB, FM, and everything!

Staff 97 • 104 De-RF Your VTVM - Works better. WA0FFJ • Getting Your Extra Class License, Part XVII: Conclusion - Now go! Staff 105 • Special Antenna Catalog Section - For your reference pleasure.

117 • More Accuracy on Microwaves - Improvement on December wavemeter. Goldstein 142 July 1970 (#118) • Improved Color Slow-Scan Television - Using Polaroid films. W4UMF 18 • Worldwide ITU Prefix/Call Area List - Call prefix allocations. W1SWX 24 • The Super Autopatch - Telephoning from your FM mobile. K6MVH 26 • How to Build a Keyer - And still retain your appliance-operator status. W9KXJ 36 • A 2-Channel Search- Lock for FM Receivers - Listening to two repeaters at once.

W3DTN 38 • A Look at Allied's Portable FM Receivers - Under $20. K9STH 44 • 450 MHz Mighty Mite - One transistor superregenerative receiver. K9VXL 46 • Cheapie 6-Meter Half-Gallon - Use 811-As and be heard.

K1CLL 48 • A High Performance Power Supply - Using an IC voltage regulator. K0ECF/7 54 • A Soldering Gun Tip - New SCR-522 conversion article. WB6PKA 59 • Latham Island DXpedition - This Zanzibar isle is for the birds. 5H3LV 60 • Study Guide For Your General Class License: Part I - Okay Techs, here it is! Staff 66 • DB to Power. WA3JBN 85 • Protection For Grid Dipper Coils - Low-cost insurance policy. WA0ABI 88 • Mobile CW Receiver - But where do you mount the code mill?

W6BLZ 90 • QSLing, Ham Radio's Own Con Game - Not for pecuniar interest, eh? VK4SS 96 August 1970 (#119) • Mount That Mobile Right!

- There are a lot of ways of doing it wrong; just ask most mobile ops. K4IPV 14 • Amateur Wattmeter for $3.85 - Unless you'd rather shell out umpteen bucks for a Bird wattmeter. K1CLL 20 • The Consummate Console - Be the envy of every ham in town. Even your wife might warm just a little.

WB2FBF 22 • An Impedance Multiplier for the VOM - How to make your VOM read like a VTVM or such. K6DQB 27 • Repeater Audio: Time Out for Quality - Hifi on FM? We sure can use it in place of that pilot-to-bombardier quality we hear so often now. K6MVH 31 • ATV: Getting a Better Picture - Improving antennas, feeders, and converters. WA6BJV 34 • That Contest Craze - Fiction?

VK4SS 40 • Log Periodic Antenna Designs for UHF/VHF - Cover feature. W3DUQ 45 • Ham Radio Chess - One hundred chess games on one frequency generate less QRM than one lid reciting his stupid 'lineup'. W0BMW 48 • Knight Kit KG-696 Rf Generator Kit Review - Reader test report. W9KXJ 52 • A VHF AM Transmitter - Using low-cost transistors. Brubaker 54 • Raising a Rhombic - First take an acre or so of land, add one rhombic, etc. W8DYF 60 • TVI From An Antenna Rotator - What next? W3URE 65 • The ICmitter - AM o r CW on 20- 160 meters.

Goldstein 67 • General Class Study Course, Part II - Reactance exposed as resistance in disguise. Staff 68 • Perkins Radio Club and K1TPX - Radio club for the blind. Champagne 87 September 1970 (#120) • Integrated Circuit CW ID Generator - Automatic identification for your station. W7PUG 16 • Six Volts From Twelve Volts - Six buck solid state voltage dropper.

K3GSV 26 • The Indicating Oscillator - Another dipper circuit, 1-400 MHz. KH6AF 29 • Tuning VHF Receivers - Clever infinite attenuator and oscillator unit. K1CLL 32 • Code Practice a la Baby Talk - Everybody's doing it.

W9PXA 35 • Using Those Bargain ICs - Three testers will test most ICs you will encounter. WA2IKL 38 • Repeater Antenna Separation - One of the easiest ways to improve repeater range. K6MVH 45 • Diode Stacks - Replacing those high-power rectifier tubes. W2BDG 54 • Deluxe Receiver Gain Control - Using one transistor and a zener. VU2JN 56 • A New Approach to Communications Equipment - A call for manufacturer standardization.

K9ALD 60 • Reed Relays for Coaxial Switching - Work very well for UHF low-power applications. W7CRV 64 • File Box Resistance Decade - First in a series of file box test gear. WB4ITN 66 • The DyComm VHF-FM RF Amplifier - Transistorized, 15 watts out. Staff 70 • General Class License Study Course - Part II, Alternating Current. Staff 74 • What Really Happened to Hamdom? - The horrible truth about CB.

W9HBF 82 • Beer Can Two-Meter Coaxial Antenna - Drink you way to a good signal. WA0RWQ/6 86 • Converting 24V Relays to 115 VAC - using a couple of cheap diodes. Douglas 88 • Versatile 2m MOSFET Converter - Low noise, high gain, ultra stable. WB6YVT 90 October 1970 (#121) • Understanding ICs - Nice National Semiconductor ad. W6DNS 16 • ICs for Amateur Use - Nice Amperex ad. K1CLL 22 • IC Regulator Circuits - Nice RCA ad. WB2EGZ 32 • Camouflage - Cutting down on fur coat money.

K9AZG 40 • Phase-Locked Loop - Does every thing better than Mr. K5JKX 42 • Function Generator -.01 Hz to 4 kHz generator. WA2IKL 58 • Toning Repeaters - How, why, and the gadget to do it. K6MVH 64 • IC Power Source - Simple regulator. W1RAN 69 • Solid-State Timer - Ten minutes. WB4MYL 70 • Four-Wire Inverted Vee - Better than average antenna.

WA6COB 72 • IC Marker Generator - 200 - 100 - 50 - 25 kHz. K4BBC 75 • Improving Regulation - In solid-state high voltage supplies. K6BW 77 • General Class Study Guide - Part III - Power. Staff 78 • DXing In Roumania - Peking behind the iron curtain. YO2BO 96 November 1970 (#122) • Differential J-FET Pre-amplifier - Now hear stations before they come on the air! W4KAE 16 • Dual Gate MOSFET - Rendering single gaters obsolete? WB2WYO 22 • Remote Quad Tuning - From the shack.

W6AJZ 27 • Two-Watt Six-Meter Transmitter - Using the crystal- heterodyne VFO. KlCLL 30 • Semiautomatic FM Channel Scanning - What, another FM article? WA0QPM 38 • Low Cost Automatic Keyer - An excellent 'first project'. WB4MYL 42 • AC Switching with Self-Powered ICs - Clever zero voltage switch. W2FBW 48 • Pioneer Radio on the Prairies - What it was like 45 years ago. W6CXC 54 • SST-I Solid State Transceiver for 40 Meters - Now here is a real fun project. W9ZTK 64 • A Low-Cost RF Wattmeter - Novice simple, Generally useful, Extra accurate.

WA3AJR 72 • Calibrate That Calibrator - Thus rendering it even more useful. W2KPE 77 • General Class Study Guide: Part IV - Impedance matching, etc. Staff 80 December 1970 (#123) • Solid State Exciters - For the build-don't-buy crowd. W6YUY 16 • Solid State Control for SSB Exciters - For really smooth tuning.

W4NVK 28 • Hams Are A Funny Bunch of People - Except me and thee. K3KMO 31 • A 2 Meter Minitransmitter - Hand portable for FM repeaters. WB6BIH 32 • Receiver Offset Tuning for the HW100 - For tuning in old timers who can't stay on frequency. WAZEAW 39 • The Little Gate Dipper - 1.7 - 225 MHz GDO with no G.

W5ETT 44 • Clinks In A Vacuum - The wife's view of amateur radio. Derfler 48 • Your Second Linear - Using the fabulous RCA 3-500Z. W4AYI 51 • General Class Study Course - Vacuum tubes. Remember them? Staff 75 • Yipes, it Talks - Start le your friends. W2FEZ 94 • Regency -An FM Late Starter - Wow!

K6MVH 96 • Transi-Test - Transistor tester, simple. W6QPP 101 • Two Terminal Current Limiter - Most have three, so this is a step ahead, right? Beene 107 • Index to Articles in 1970 - Ridiculously detailed yearly index. 108 January 1971 (#124) • LX for Leisure - A relaxed DXpedition to Luxembourg. G3BID 18 • Try DXing the World the Hard Way!

- Around the world in 90 frustrations. K6KA 22 • Split Phones - A DX Operating Aid - You've got two ears? Why not use them both? GW8PG 30 • Can Ham Radio Manufacturing Survive? Staff 35 • Heath Tener Modification - Bigger fuse.

K8JLK 45 • Testing the RP Electronics Compressor - Cheapest wav to double your power. Staff 46 • For the Love of a Ham - Show this to a wife (your own, preferably). WB6AOF 48 • Duty Cycle Duty Factor - It is your duty to read this. W2OLU 50 • Repeater Zero Beater - An FM article? W1IRH 52 • Getting Hep to ICs - Pun intended. K6MVH 56 • Voices from the Past - Ten, thirty, fifty years ago today. Staff 62 • Basics of Surplus FM - Another FM article?

WB2AEB 64 • A Parabolic Beam for 10, 15, or 20 Meters - Big. WA2SJZ 66 • The Galaxy PM 210 - Even more FM? K2ULR 69 • Lightning as it Affects Ham Radio - It affects, believe us, it affects. Patzsch 73 • IC Receiver Accessory - Our old friend Select-o-ject in I.C. W2EEY 76 • Inverted Attic Antennas - TVI from the mystery neighbor. W2SF 81 • Double Balanced Mixers - The heart of SSB.

K2PUR 86 • A Quick and Permanent Tool Marker - Tom Swift and his Electric Pencil. K5JKX 91 • There is a Santa.But! - Think before you pray. W6LJZ 92 • A New Start from Washington - An insider refutes QST December editorial. W8GI 94 • Amateur Study Guide Supplement - Q & A special with no A's. Staff 98 February 1971 (#125) • New Approach for the Metal Locator. W6HDM 10 • Practical Circuit Applications Using That Strange Didoe: The Varactor.

Mengel 16 • A Clean AFSK Unit. WB4FMP 22 • An SSTV Patch Box. W4UMF 26 • Amateur TV Easy.

K2OJL 30 • A Tuning Indicator for RTTY and FAX. W1OER 34 • Two Simple Tone Units For Repeater Use. VE2BZK 36 • On Efficiency Organization and Magazines. WA3BKC 40 • 220 MHz Converter for FM Pocket Receivers. K1CLL 42 • Magnetic Deflection for SSTV. WB2ZIV 46 • Build an 8 Transistor Code Oscillator With Just One IC. K6MVH 53 • The Beeper.

K1ZJH 56 • Study Guide- General Class License- Part VI - Gazintas and Gazoutas. Staff 62 • Phone Patch Level Adjustments and Manproofing. W4NVK 78 • Wouldn't You Like To Get Into RTTY?

WB2TCC 81 • Perf-Board Terminal. K5LLI 83 • Tuning All-Band Vertical Antennas.

W5QKO/AI4QKO 85 • The Low-Ohm Meter. W3YZC 87 • A Cheap and Easy Gus Watcher.

W9SDK 92 March 1971 (#126) • Integrated Circuit Audio Filter - Clean up that dirty audio with a filter. W2EEY 12 • Integrated Circuit Six Meter Converter - Not for bigots with six unconverted meters. WB4KMB 16 • Trap-type Vertical Antennas - Adding stubs for two meters. W2EEY 18 • Resurrecting Granddaddy - Fun with a 1925 parametric amplifier.

K6BIJ 22 • Digital Counters - Five digit. W0LMD 26 • Identifying Surplus Electronic Equipment - Military marking system. W6DDB 37 • The Horizontal-Output Linear - A $50 kilowatt amplifier? W2AOO 40 • DX America First - DXpedition to Maine. K1OXK 43 • Phone Patch: No Cost, No Wires - Phone patching is illegal in Rwanda. WA2EAW 49 • Mt.

Snow: To the Repeater - On Skis - Our cover feature. An FM article. K6MVH 54 • Repeater Audio Mixer - Another great FM article. W1ELU 57 • Something New in PC Construction - Building with scissors.

WA1EJU 61 • Switching Remote Linears - Like in the car. W0HFK 65 • Digital RTTY Accessories - Regenerative repeater, stunt box, speed conversion. K5ZBA 66 • The Coathanger Groundplane - Two meters (FM!). K6MVH 72 • General Class Study Course - Part VII. Power and how to get it.

Staff 74 • Reading 5 Code RTTY in Binary - Just what you've been waiting for. WB2MPZ 93 • Petitions to FCC - 220 MHz proposals. Staff 118 April 1971 (#127) • What's Really Different About FM? - A lot, a whole lot! K6MVH 12 • Aftermath: A Noise Blanker That Works - The author returns to the drawing board. W8RHR 18 • FM Intermodulation on 2m - Chart for locating interference sources.

W6YAN 20 • Hotroddinq Motorola's Hybrid HTs - A commercial bid for the 450 market. W7PUG 28 • Stability Without Crystals - Introducing the Sentry Modcom, whatever that is. Staff 30 • Switching Remote Linears - or local linears. W0HKF 32 • Using Microwave for Repeater Links - Microwave propagation for any purpose, really. Lenkurt 34 • IC Repeater Identifier - It will also identity any other station.

WB6BFM 49 • Testing the National NCX 1000 - And enjoying every minute of it. W2NSD/1 58 • Build Your Own 2M FM - Build this little hand transceiver. K1CLL 60 • Repeater Directory for 1971 - Every open repeater in North America listed here.

Staff 78 • National FM Standards - FM channels on the VHF and UHF bands. W6YAN 100 • The FM-Marketplace - Buyers' guide to 2m FM transceivers. Staff 102 • Meter Evaluator - New, and-much better, way to measure meter resistance. Marovitch 116 • A Simple Varactor Modulator for Going FM - Changes AM rig to FM.

WA9TFY 121 • FM Fun With a Scanner - Listening to eight channels at once. Staff 122 • Low Cost Signal Source - 1.8 to 450 MHz for tuning your receiver. VE3GFW 124 • Even More on Touchtone - Answers to your questions on Touchtone. W1IRH 126 • A Solid-State Preselector - Tubes you're expecting?

Read brand C magazine. W5JJ 128 • The Transistor 12 Watter for 10 - Three transistors and a barrel of fun. W5PAG 131 • A Slice of Nippon Culture - How did an SWL article get into 73? Staff 135 • Ten Tee Receiver Test - Nice new portable receiver. WB2MYU 138 • Getting Publicity for Ham Radio - And, boy!

Can we use it! K0YTI 140 May 1971 (#128) • A Big Signal on 75M, Mobile - Only 54' long! W6MOG 14 • A Dual Gate FET Preamp for 2 Meters - Do it yourself preamp for those too lazy to buy. WB6BIH 20 • A Neat and Novel Receiver Accessory - 73 finally invents the crystal calibrator. WA6CPP 24 • The Hartley Oscillator Story - Invented in 1914, and still with us. K2SKV 28 • The Widening World of Instant Replay - To videotape or not to videotape.

Staff 30 • Design Concepts for Low-Power Amplifiers - Using some new transistors. Campbell, Westlake 36 • The Price of 10 Extra Feet - An epic in trivia. K9PYY 39 • A Transistorized 10 Meter DSB Transmitter - Four transistor rig. K4EPI 40 • Reviewing the 1971 Radio Amateurs Handbook - It's okay. WB2MYU 42 • On the Spot - Report on LaBalsa ham-raft. VK4SS 46 • FM Walkie-Talkie Transceiver Directory - Prediction: Walkie-Talkies will be very popular. Ralston 52 • Advanced Preamp Compressor Clipper - Can also be used by Generals.

VE3GSP 56 • The transistorized LM Freq Meter - 1971-izing this WWII goody. W5SOT 60 • Ham Radio, the Bible and Peru - Ham radio in the interior. OA8V 66 • 450 Remote Site Transmitter - Solid-state rig. WA1HVG 69 • The S-Derived Filter - For cw audio filtering.

W3KBM 74 • Electronic Health - A cure for cancer? Moore 76 • Experimenter's One-Tube $10 2-Meter Transceiver - If you like tubes. W9HBF 78 • Questions, Questions, Questions - And answers. W9EGQ/KHD6961 80 • Understanding Your Amateur Radio Operator - XYL's ham dictionary. WA6JLJ 82 • High Power Surplus for 2M FM - Very reasonably priced dB's. K6MVH 85 • Evaluation of Swan's 6 and 2 Meter Antennas - They work good. WA6CPP 90 • General Class Study Course: Part VIII - Transmitters.

Staff 94 June 1971 (#129) • Driven Versus Parasitic Antenna Elements on Two Meters - Are they really better? W6AJF 12 • 3 Squares for Two - Humdinger Quad. K8CFY 18 • I Can't Learn the Code - Too bad. See you on eleven meters.

W0FEV 22 • Covering Additional Frequencies With Dipoles - 40/15m, 80/10m, etc. W9EGQ 26 • Weather Balloon Verticals - The only way to go is up. K4EPI 32 • Squelch Addition for the Pocket Pager - You don't have a pocket pager?

WA8PIA 34 • VFOing the Twoer - Drive your friends off two meters. WA3WHI 40 • Transmitter Tuning of Mobile Antennas - Loading coil final tank circuit. W2EEY 44 • I Built a Counter - The Heath. Sessions 48 • Low Cost Transistor Power Supply - Also powers high cost transistors. W8AVR 52 • Don't Trust the Ground Wire - Particularly if it is over 30. W5FQA 54 • The File Box Capacity Decade - Handy.

WB4ITN 56 • A Practical 40 Meter DX Antenna - 4 honest, not to be sneezed at, dB! W7JLU 60 • A Commercial Bid for the 450 Market - Meet the Alpha 100W amplifier. Staff 63 • Modification to HW Transceivers - Adding headphones. WB2WYO 65 • CW Selectivity - For the sideband receiver. ZL4OK 68 • General Class Study Guide: Part IX - Putting the 'Tell' in 'Tele'.

Staff 80 July 1971 (#130) • An IC Audio Processor - Two IC Project. W2EEY 16 • Audio Signal Generator - Wein bridge reinvented. W3SGV 20 • Questions, Questions, Questions - Answers, answers, answers. W9EGQ 24 • A Filter Box for CW Ops - Mind boggling CW selectivity. K8TSQ 26 • Duals - Think piece for this month. WB2PAP 34 • Miniature Add-On Oscillator for 2M FM - Little P.C.

WB6BIH 40 • Collinear Gain Antenna for VHF/UHF Repeaters - Verticle beam antennas? K6MVH 42 • Invitation to Transmit - This is women's lib?

Thurmond 43 • FM Directory - Everything you always wanted to know. Staff 49 • Desktop Base Stations from Motorola G Strips - Another FM article in 73? W9VZR 56 • Camouflage Extra Class - How to sneak a 40m beam past the XYL. W4CWB 63 • File-Box Transistor Beta Tester - Are your transistors really adequate? WB4ITN 66 • 2 KW From Heath - Heath does it again! W6BMK 77 • General Class Study Guide - Part X - The listening post. Staff 80 August 1971 (#131) • DXpedition to the Laccadives - Another rare one de-rared.

VU5KV 16 • Facsimile for the Radio Amateur: Part I - Scan these facts. Dean 22 • You Can Take it With You - Camper portable. K5PAC 28 • Diary of a DXpedition - KD2UMP dumps on DXers. KD2UMP 32 • 'TINY TIM' Linear Amplifier - All bands 600 watts. WA6VLI 38 • Four-Tube Station - For 40 and 80 meter CW. W5LET 48 • All's Well in Amateur Radio?

- Not on your ARRL tintype. W8GI 54 • A Digital Readout for Your VFO - You might call this Signal Two. WA2IKL 56 • 15 Meter Signals from Jupiter - You don't need the Arecibo dish. K6MIO 66 • General Class Study Course: Part XI - Antennas and feedlines. Staff 75 • The Pink Ticket Rejector - Wales amateur invents the wavemeter. GW8PG 90 • DX From the Stars - But does it count for DXCC?

WN4ONW 93 September 1971 (#132) • Transformerless Power Supplies - Theory and six practical circuits. K3SVC 14 • Build a Solid-State Module TV Camera - And amaze your friends. W0KYQ 18 • An Experimenter's Guide to IC Substitution - Getting HEP to IC's.

K5JKX 28 • Microwaves and Microsounds - How to see underwater. K1CLL 38 • RF Power Measurement with Hot Carrier Diodes - Rf wattmeters for up to 450 MHz. W6AJF 42 • IC/Photocell Compressor/AGC Unit - With no noise buildup problems. W2EEY 47 • The Theft Stopper - Booby trap for the car.

K4EPI 52 • A Marketing Man's Approach to Ham Radio - Ham radio is a product. WB8CDU 53 • Multi-Channel Operation with the Motorola HT-200 - HT-200 modification. K8YQH 59 • Facsimile for the Radio Amateur: Part II - Scan this thriller continued from last month. Dean 66 • Man-Made Interference - Its causes and cures. WB5DEP 78 • A Linear Stable VFO - Better a VFO than a UFO.

W8RHR 86 • General Class Study Guide XII - Some general questions on TVI, etc. Staff 89 • Effective Heat Sinking - Preventing fried germaniums and silicons. K5ZBA 101 • The Spider - Interfacing your transceiver and linear. W4RIZ 104 • 'Say Coo, Say Coo, Day Eckees' - Some hams don't speak English. W7OXD 107 • An IC Pulser for the Amateur Experimenter - For the many unpulsed IC's around.

W6GXN 112 • A DC Isolator for Phone Lines - Keep out of trouble. Weinstein 117 • New Hope for Learning the Code - Learn the code in two hours. WA1KWJ 119 • 73 Tests the Gonset Super Scan Receiver - Minding 8 FM channels at once almost. W2NSD 122 • New Mark Products $30 Battery-Boost Regulator - Works from 11 volts up. Brown 124 October 1971 (#133) • Wide-Range RF Milliwattmeters Using HCD's - Using Hot Carrier Diodes! W6AJF 15 • Signaling Through Space Without Wires - How it all got started. K1CLL 23 • An Instant FM Repeater for Emergency Use - Two FM rigs one repeater.

K2OAW 29 • It's the Real Thing - Power supply not using transformers. VE3GSP 31 • Meteor Showers: On Prediction Accuracy - WAS on two meters? W5KHT 37 • Simple Digital Remote Control Circuits - Doing lots with few wires. W1EZT 41 • How to Be An Amateur - A good amateur is ignorant, egocentric, etc.

W2ZGU 49 • A Simple Reverse Current Battery Charger - For recharging flashlight batteries. W6FPO 55 • It's In the Bag - Almost. WB6JLC 59 • Passive Repeaters - And you can rent out the front for a billboard. W7EEX 61 • Converting the AC/DC for WWV - Keep WWV at hand to check your calibrator. W3JJU 75 • Fail Safe Switching - Infallible sequential switching. W7CJB 77 • Back to Mother Earth the Easy Way - Installing a 10' ground pipe - easily! WA1FHB 79 • 3 dB for 3 Bucks - Audio tailoring for SSB.

W2EEY 81 • The Ham's Publicity Primer - Spreading the word. WB2FBF 85 • Some Notes on the Swan 350 - Six improvements for a great rig. K1KXA 101 November 1971 (#134) • A Big Three Element Beam - Three elements on 75m - ZOWIE! W4AXE 13 • Remote Tune Your Groundplane - This is a real screwed up antenna. W2AOO 17 • How to Build an Economast for Under $50 - Towerless is powerless in working DX. WB2FBF 21 • A Gain Vertical Antenna for 2 Meter FM - 10 dB = 10 X power, transmit and receive!

K9STH 25 • Photographing Radio Equipment - Maybe we can have better pictures in 73? W2EEY 29 • Biasing the Transistor Audio Amplifier - Who among us is without bias? W5JJ 37 • The Split Site Repeater - Greatly improves repeater coverage. K6MVH 39 • The Art of T-Hunting - Have you been missing this fun?

WB6IQS 45 • An Ultra-Simple Selective Audio Filter - Ideal for the CW op, moonbounce, etc. W8RHR 49 • Transistor/Diode File Box Tester - Better lay in a supply of file boxes. WB4ITN 51 • Crystal Tester - Two transistor go/no go tester.

K6VCI 55 • A Compact Kilowatt for Six Meters - Think of the TVI records you can set with this! K1ZJH 57 • The 3-4-6 Quad - 'The first stateside signal of the day. K2MNJ 63 • Let's Revise the Morse Code - Isn't it really about time? W7OXD 79 • A Pie-Net for Transistor Finals - Specifications for all bands 160 - 6m. W5PAG 85 • Changing the 75S3 into a Better CW Performer - Using a $58 Collins mechanical filter. OA4KF 93 • Why Coax? - Twin lead is cheaper and has less loss.

G3BID 95 • Communications Yardsticks - dB, dBm, dBmc and other erotica. Lenkurt 101 • Metalphoto Your Nameplate - This will really fake out the vjsitors. W6BLZ 107 • Amateur Radio and the Disabled - Great hobby for the shut-in.

WA2CGA 109 • Solid State Microwaves for Amateurs - Crystal control on 2300 MHz. K1CLL 113 • Those Funny Looking Cards - A Washington lobby? Who needs it! WA1GFJ 123 December 1971 (#135) • Convert Your 7 MHz Cubical Quad to All Bands - Everybody's doing it. K6DDO 13 • The Indoor Quad - How to cram a quad into an apartment. K9RJO 17 • Getting to Know Tee Squared EII - This is a very logical article. Thorpe 19 • More Power From 6146's - Getting more power without disaster.

W2YW 27 • Radio Direction/Range Finder - Think Piece. K6BIJ 29 • Curtis CW Identifier - For repeaters and remote base stations. K6MVH 31 • Morse Memory - 30 letter memory for ident, contests, etc. WA6ATT 37 • 73 Tests the GLladding 25 FM Transceiver - 25 watt $250 FM transceiver. Staff 49 • 73 Tests the GAM TG-5-S Gain Vertical - Why we use it for our repeater. Staff 77 • SCR Mobile Theft Alarm - Burglars please do not read this article. W1BHD 80 • DX QSO's or Contacts - The human side of DXing.

G3BID 81 • Code Shorthand - Toward speedier copying. K2EE 83 • VHF Double Sideband - Sideband? On two meters? W4KAE 85 • 73 Tests the 270 Automatic Alarm - And likes it.

And likes it! W2NSD/1 92 January 1972 (#136) • RTTY Art - A new art form is born. WA6PIR 13 • The TT-63A As A Display Generator - Surplus conversion for RTTY.

K2BEH 17 • Television Monitor - All solid-state except for the tubes. K0MOC 21 • 73 Tests The Icom IC-21 Transceiver - Twenty-four channels -holy moly! K1NUN 27 • 73 Tests the Regency Transcan FM Transceiver - Listening to 8 repeater channels at once. W2NSD 29 • 73 Reviews The Allied AX-190 Ham Receiver - New solid state receiver for $250. Staff 30 • Phone Phreaks vs Ma Bell - How people get caught cheating TPC. WB8LBV 31 • AFSK Revisited - or, how I learned to stop worrying and love teletype. WA3AJR 35 • Tuning Indicators for SSTV Monitors - The sooner you try SSTV the better for you.

K7YZZ 39 • Designing Diode Matrix Units - For automatic ID. WA0ZHT 45 • Circuits, Circuits. Circuits - Circuits.

Staff 53 • The Making Of A Modern Day Receiver - Why some are better than others. W2FEZ 57 • Simultaneous Multi-Band Transmissions - In case you want to imitate W1AW. W2EEY 61 • A Pre-Novice Transmitter - A fun way to learn code. WA8OIK 67 • The Problem of Inversions - The logic of USB vs LSB on SSB. K3WNX 69 • A Medium Frequency Converter For High Frequency Receivers - Tuning 400 - 1000 kHz on you r 80m receiver. VK3IQ 73 • Easy End -Feed Z Match - End-feed antenna 80 - 10m.

G3OGR 75 • Coat-Hanger Antenna For 2 Meters Revisited - The improved coat-hanger. Gelsinger 77 • 73 Uses The Simpson Model A- Well designed, well built.

Staff 79 • 73 Reviews the C.

,,, Interpretation and reporting of coagulation tests is a time consuming task for practicing pathologists and pathology residents. Creating a report that is concise and complete can be difficult. Learning to formulate reports is a fundamental aspect of pathology residency; however, it can be challenging without suitable guidance. The reports created by pathology residents may require extensive editing by the attending pathologist, thus delaying the final report. Once a resident learns the skills involved in report creation, implementing an efficient system to generate similar reports can expedite the sign-out process and reduce turnaround time. However, attempts to reduce the time spent generating reports often increase the frequency of typographic errors.

The College of American Pathologists has provided a series of checklists to assist pathologists in producing surgical pathology reports. Web-based synoptic reporting systems have been successfully integrated into some specialties, including surgical pathology and hematopathology. These systems have several advantages, including greater efficiency, reduced turnaround time, and fewer reporting errors. Our institution previously developed and described a system to generate peripheral blood smear reports. Due to its practical and educational success, a system was subsequently created for the interpretation and generation of coagulation analyses.

Thromboelastography (TEG) is used to assess hypo- and hypercoagulable states and can guide transfusion with fresh-frozen plasma, platelets, or coagulation factor concentrates. At our institution, TEG is primarily used for patients in the emergency room, trauma unit, or critical-care departments. We report our TEG results separately, rather than integrating them with other conventional coagulation studies. The interactive reporting program that we describe herein assists in formulating the best possible report in a short amount of time; it serves as an educational tool for residents and a time-management resource for practicing pathologists. Materials and Methods We developed a Web-based reporting system composed of 119 coagulation report templates ( ) and 38 TEG report templates ( ) covering a wide range of clinical and laboratory findings.

The knowledgebase is comprised of reports previously issued for patient care that members of the clinical pathology faculty selected as typical examples for a given result. The interactive coagulation panels consist of 29 findings that can be selected by themselves or in any combination. These findings are subdivided by test and include mixing study for prothrombin time (PT)/partial thromboplastin time (PTT), platelet aggregation, heparin-induced platelet aggregation, factor VIII inhibitor screen, factor IX inhibitor screen, von Willebrand panel, and lupus anticoagulant panel (). The TEG template generator allows for the selection of normal, low, or high values for reaction time (R), angle alpha (α), maximum amplitude (MA), and lysis after 30 minutes (Ly30) (). Once the selections are made, the report templates are displayed in a text window for editing. Both programs can be accessed freely on the Internet at, by selecting the heading labeled “9. INTERPRETATION REPORT TEMPLATES USED FOR TRAINING,” followed by selecting “Coagulation Report Templates” or “Thromboelastograph Templates.” The system is designed to provide users with a set of concise yet comprehensive templates for a broad range of diagnoses related to coagulation disorders.

User interface for thromboelastography (TEG) report generation with sample reports (). Our Web-based reporting system was implemented in Hypertext Markup Language (HTML). Our system achieved interactivity with users by means of JavaScript, a scripting language that adds dynamic features to Web pages. The dynamic features allow users to interact with the graphical interface components displayed on the computer screen, such as buttons, lists, and check boxes, to retrieve the desired information. These dynamic features can be coded in HTML files in the form of JavaScript functions or subroutines.

We also used JavaScript to create functions and subroutines used in the search engine for displaying the report templates. The website is installed on a Microsoft Window 7 server running the Microsoft Internet Information Server (Microsoft Corporation, Redmond, WA) software in the Department of Pathology and Laboratory Medicine, University of Texas–Houston Medical School.

The hospital laboratory information system (LIS) at our institution is Cerner Millennium (Cerner Corporation, North Kansas City, MO), which is integrated with other Cerner clinical systems, including electronic medical records, radiology, and pharmacy. The Web-based reporting system made available to residents on the hematopathology service beginning in July 2011. All reports generated by this system are reviewed by the attending pathologist for accuracy and typographical errors before release.

To demonstrate how the system works, we offer the following example. The user interprets the results of a mixing study as indicating factor VII deficiency. He or she checks the corresponding box under the correct test and then left-clicks the “get report now” button (). Two sample reports are generated in the text box under the heading “DRAFT FOR COAGULATION REPORT” (). The user can now copy and paste the report that most closely matches the patient data into the “final draft” text box, after which the report can be edited with necessary changes or additions.

The final draft will then be copied into the report in the LIS. Results We evaluated our Web-based coagulation reporting system via survey of 21 pathology residents who rotated through the hematopathology service from July 2011 through July 2012. The recruited residents used the system for drafting preliminary coagulation reports during their month-long rotation in hematopathology.

None of the residents had previous experience with the system. The attending pathologist evaluated the draft reports prepared by residents for accuracy, comprehensiveness, and the presence of typographic errors.

At the end of the rotation, an interviewer (A.N.N.) asked each resident the following survey questions, regarding whether the synoptic system: • Decreases the amount of time preparing the report • Decreases typographical errors and grammatical errors • Includes all critical information in the report The responses from residents to this survey were uniformly positive. All participants stated that this Web-based reporting system greatly improved turnaround time (estimated 30% to 40% decrease in the amount of time required to prepare reports). All residents observed that typographic errors, grammatical errors, and omission of important information in the drafts were significantly decreased. Similar benefits were noted by the attending pathologists who signed out the final reports.

Discussion Web-based education has been shown to be an effective teaching tool. Interactive Web-based tools stimulate higher-order thinking and foster the learning of concepts rather than rules.

This methodology has also proven effective in teaching pathology. At our institution, we have promoted and implemented this valuable teaching method. We have created online interactive templates in hematopathology to assist in the generation of clinical reports, to reduce turnaround time and to aid in resident education. Two of us reported previously on the use of such templates for peripheral blood smears; we have now expanded on this information by adding coagulation and TEG templates. The online format of the templates conveys numerous benefits.

Unrestricted free access via allows users convenient, broad access to this Internet-based tool. JavaScript allows us to edit the website with relative ease and ensures that its content stays up to date. The free access eliminates the need to purchase and install software. Also, the website is designed to be intuitive and user-friendly.

Further, the ability to copy and paste directly from the website onto the reporting software of each institution bypasses compatibility issues. The text can be freely edited within the website or in the reporting software, depending on the personal preference of the user. Download Bonnie And Clyde Brigitte Bardot & Serge Gainsbourg. Because our templates and the LIS interface are opened in separate windows (different threads in the operating system), security is not considered an issue. Our intention is for this website and the templates it contains to be a tool for pathologists everywhere.

The success of our endeavor will ultimately be gauged by the number of people who regularly use it. The reports serve as templates; thus, they require editing because each patient is unique.

However, editing is minimal for most standard reports, and according to our residents and faculty members, processing feedback on certain sections of a report is preferable to typing an entire report. The use of a template also eliminates the need for transcription. There are multiple daily coagulation studies and TEG studies that require timely reporting. In the case of so many relatively brief reports, removing the transcription step from the sign-out process reduces turnaround time and cost. Resident education can also be enhanced by the use of the online templates.

Use of our templates does not eliminate the need for critical thinking. Residents must still generate their diagnoses and conclusions based on the available data. They can use the website to generate a report by selecting their diagnosis from the displayed options. The website merely provides a tool for generating reports that require minimal editing. Because the focus of this program is on the reporting aspect and not on producing the diagnosis, the resident can concentrate on making the diagnosis rather than the report.

For an experienced pathologist, the reduction in the amount of time spent on sign-out accrues from having a convenient method for generating a multitude of different coagulation reports. However, this reporting method has certain limitations. Any updating of the website requires that the user or administrator edit files on the Web server. Although JavaScript programming language is relatively simple to use, it still requires a certain level of technical knowledge. Further, if an institution blocks all outside websites, our site would not be accessible. An easily accessible, user-friendly, Web-based synoptic reporting system for coagulation can be an asset to pathologists. Survey data indicate that the program improves efficiency by reducing typographic errors and decreasing turnaround time.

This system is currently being used by residents and faculty members at our institution, and is the preferred method for generating coagulation reports. Abbreviations •. Laboratory information system Appendix 1 Coagulation Templates • Baseline prothrombin time (PT) is slightly prolonged, corrected with mixing. Thrombin time is normal, at 16.2 seconds. Impression: mild Factor VII deficiency (as observed in vitamin K deficiency or liver disease).

Clinical correlation is suggested. • Baseline prothrombin time (PT) is prolonged, corrected with mixing.

Thrombin time is normal, at 15.6 seconds. Impression: factor VII deficiency (as observed in vitamin K deficiency, warfarin sodium treatment, or liver disease). Clinical correlation is suggested. • Baseline partial thromboplastin time (PTT) is prolonged, corrected with mixing. Thrombin time is normal, at 18.8 seconds.

Impression: results are suggestive of factor deficiency in the intrinsic pathway (factors VIII, IX, XI, or XII). • Hemophilia A Baseline partial thromboplastin time (PTT) is prolonged, corrected with mixing.

Thrombin time is normal, at 17.3 seconds. Impression: results are consistent with factor deficiency in the intrinsic pathway.

Factor VIII is low (21%), with normal von Willebrand factor level, consistent with hemophilia A. • Baseline partial thromboplastin time (PTT) is prolonged, partially corrected with mixing.

Thrombin time is normal, at 19.2 seconds. Impression: findings are suggestive of factor deficiency in the intrinsic pathway. However, an inhibitor cannot be ruled out (such as lupus anticoagulant or Factor VIII inhibitor). • Baseline prothrombin time (PT) is slightly prolonged, corrected with mixing.

Baseline partial thromboplastin time (PTT) is prolonged, partially corrected with mixing. Thrombin time is normal, at 17.1 seconds. Impression: findings are suggestive of factor deficiency in the common and/or in intrinsic and extrinsic pathways. However, an inhibitor cannot be ruled out (such as lupus anticoagulant). • Baseline prothrombin time (PT) and partial thromboplastin time (PTT) are prolonged, corrected with mixing. Thrombin time is normal, at 18.8 seconds.

Impression: findings are suggestive of factor deficiency in the common and/or in intrinsic and extrinsic pathways. • Baseline prothrombin time (PT) and partial thromboplastin time (PTT) are markedly prolonged, corrected with mixing. Thrombin time is prolonged, at 28.8 seconds.

Impression: findings are suggestive of factor deficiency in the common and/or in intrinsic and extrinsic pathways. • Normal von Willebrand panel results: no decrease in any components von Willebrand panel results show no decrease in any components (factor VIII, von Willebrand factor [vWF]: antigen and functional). Impression: no evidence of von Willebrand disease (except for postinfusion level in patients with known disease). • von Willebrand panel results: decrease in all components The von Willebrand panel results show decrease in all components (factor VIII, von Willebrand factor [vWF]: antigen and functional). Impression: results are consistent with von Willebrand disease.

• Factor VIII deficiency, no evidence of von Willebrand disease The von Willebrand panel results show a decrease in factor VIII level (7%), no decrease in von Willebrand factor (vWF) (antigen and functional). Impression: results are consistent with factor VIII deficiency, no evidence of von Willebrand disease.

• Normal platelet function Platelet aggregation study shows adequate aggregation with all reagents tested (arachidonic acid, adenosine diphosphate [ADP], collagen, epinephrine, and ristocetin). We observed no loss of secondary aggregation. Impression: no evidence of platelet dysfunction. CPT: 85576 x5. • Normal aggregation with collagen/ristocetin Platelet aggregation study results show decreased aggregation with arachidonic acid, adenosine diphosphate (ADP), and epinephrine.

Loss of secondary aggregation is observed with ADP and epinephrine. Aggregation with collagen and ristocetin is adequate. Impression: findings are consistent with platelet dysfunction. This pattern is suggestive of medication effect (most likely, nonsteroidal anti-inflammatory drugs [NSAIDs]). Clinical correlation is suggested. CPT: 85576 x5. • Normal aggregation with ristocetin Platelet aggregation study results show markedly decreased aggregation with arachidonic acid and moderately decreased aggregation with adenosine diphosphate (ADP), collagen, and epinephrine.

Loss of secondary aggregation is observed with ADP and epinephrine. Aggregation with ristocetin is adequate. Impression: findings are consistent with platelet dysfunction. This pattern is suggestive of medication effect (most likely, nonsteroidal anti-inflammatory drugs [NSAIDs]). Clinical correlation is suggested. CPT: 85576 x5.

• Abnormal aggregation with adenosine diphosphate (ADP) Platelet aggregation study shows adequate aggregation with arachidonic acid, collagen, epinephrine, and ristocetin. Aggregation with ADP is markedly decreased, with loss of secondary aggregation. Impression: findings are consistent with platelet dysfunction.

This pattern is suggestive of medication effect (such as of clopidogrel bisulfate) or platelet ADP-receptor defect. Clinical correlation is suggested. CPT: 85576 x5.

• Abnormal aggregation with adenosine diphosphate (ADP) at low concentration Platelet aggregation study results show adequate aggregation with arachidonic acid, collagen, epinephrine, and ristocetin. Aggregation is markedly decreased, with loss of secondary aggregation at a low concentration of ADP. However, aggregation is adequate at a high ADP concentration. Impression: findings are consistent with mild platelet dysfunction. This pattern is suggestive of medication effect (such as clopidogrel bisulfate) or platelet ADP-receptor defect. Clinical correlation is suggested. CPT: 85576 x5.

• Negative heparin-induced thrombocytopenia (HIT) test results Heparin-induced platelet aggregation study results show no significant increase in aggregation with heparin added (as high as 4% above the value with normal saline used as baseline). Impression: negative for heparin-associated antibody via the heparin-induced platelet aggregation method.

• Negative heparin-induced thrombocytopenia (HIT) test results/spontaneous aggregation of platelets Heparin-induced platelet aggregation study results show spontaneous aggregation with normal saline (20%) and no significant change in aggregation with heparin added. Impressions: a) Negative for heparin-associated antibody via the heparin-induced platelet aggregation method. B) Spontaneous aggregation of platelets, suggestive of thrombogenic plasma causing activation of platelets. • Baseline prothrombin time (PT) and partial thromboplastin time (PTT) are markedly prolonged, essentially corrected with mixing.

Thrombin time is normal, at 18.7 seconds. Impression: findings are suggestive of factor deficiency in the common and/or in intrinsic and extrinsic pathways. • Baseline prothrombin time (PT) and partial thromboplastin time (PTT) are prolonged, only partially corrected with mixing. Thrombin time is normal, at 16.8 seconds. Impression: findings are suggestive of an inhibitor (such as lupus anticoagulant).

• Baseline prothrombin time (PT) is slightly prolonged; this is corrected with mixing. Baseline partial thromboplastin time (PTT) is markedly prolonged, not corrected with mixing. Thrombin time is markedly prolonged, at 192 seconds. Impression: findings are most consistent with heparin effect.

Clinical correlation is suggested. • Normal aggregation with collagen/epinephrine/ristocetin/arachidonic acid (AA) (high concentration)/adenosine diphosphate (ADP) (high concentration) Platelet aggregation study shows decreased aggregation with AA and ADP, both at low concentrations. Aggregation with AA and ADP at high concentration is adequate. Aggregation with collagen, epinephrine, and ristocetin is adequate. Impression: findings are consistent with mild platelet dysfunction. This pattern is suggestive of medication effect.

Clinical correlation is suggested. CPT: 85576 x5.

• Normal aggregation with collagen/ristocetin/arachidonic acid (AA) (high concentration) Platelet aggregation study results show decreased aggregation with ADP, epinephrine, and arachidonic acid at low concentration. Aggregation with arachidonic acid at high concentration is adequate. Aggregation with collagen and ristocetin is adequate. Impression: findings are consistent with platelet dysfunction. This pattern is suggestive of medication effect.

Clinical correlation is suggested. CPT: 85576 x5. • Baseline partial thromboplastin time (PTT) is prolonged, not corrected with mixing Thrombin time is normal, at 18.2 seconds. Impression: findings are suggestive of an inhibitor in the intrinsic pathway (such as lupus anticoagulant or factor VIII inhibitor). • Baseline partial thromboplastin time (PTT) is markedly prolonged; this is partially corrected with mixing. Thrombin time is prolonged, at 38.6 seconds.

Impression: findings are suggestive of heparin effect. Clinical correlation is suggested. • Abnormal platelet aggregation study results due to low platelet count cannot be ruled out.

Platelet aggregation study results show decreased aggregation with all reagents tested (arachidonic acid [AA], adenosine diphosphate [ADP], collagen, epinephrine, and ristocetin). Loss of secondary aggregation is observed with AA and ADP. Platelet count on sample tested is 76,000/cmm. Impression: abnormal platelet aggregation study results due to low platelet count cannot be ruled out.

Repeated testing at a later time when platelet count is higher than 100,000/cmm is suggested if clinically indicated. CPT: 85576 x5. • Baseline prothrombin time (PT) is slightly prolonged, corrected with mixing. Baseline partial thromboplastin time (PTT) is markedly prolonged, not corrected with mixing. Thrombin time is normal, at 19.8 seconds. Impression: findings are most consistent with an inhibitor. Further testing for lupus anticoagulant is suggested if clinically indicated.

• Abnormal aggregation with all reagents, in chronic renal insufficiency Platelet aggregation study results show decreased aggregation to arachidonic acid, adenosine diphosphate (ADP), collagen, epinephrine, and ristocetin. Loss of secondary aggregation is observed with ADP. Impression: dysfunctional platelets. The pattern observed in this study is not specific, but it is typically observed in chronic renal insufficiency. Clinical correlation is suggested. CPT: 85576 x5.

• Normal aggregation with arachidonic acid (AA)/ristocetin Platelet aggregation study results show adequate aggregation with AA and ristocetin, decreased aggregation with adenosine diphosphate (ADP), collagen, and epinephrine. Loss of secondary aggregation is observed with ADP and epinephrine. Impression: findings are consistent with platelet dysfunction. This pattern is suggestive of medication effect. Clinical correlation is suggested. CPT: 85576 x5. • Baseline prothrombin time (PT) and partial thromboplastin time (PTT) are markedly prolonged, essentially corrected with mixing.

Thrombin time is prolonged, at 58.1 seconds. Fibrinogen level is low, at 220. Liver function test results are markedly abnormal. Impression: findings are suggestive of factor deficiency in the common and in intrinsic and extrinsic pathways secondary to liver disorder.

• Baseline prothrombin time (PT) is markedly prolonged, partially corrected with mixing. Baseline partial thromboplastin time (PTT) is markedly prolonged, not corrected with mixing. Thrombin time is markedly prolonged (more than 100 seconds) Impression: findings are most consistent with the combined effect of warfarin sodium and heparin.

Clinical correlation is suggested. • Positive heparin-induced thrombocytopenia (HIT) test results Heparin-induced platelet aggregation study results show significant increase in aggregation with heparin added (as much as 30% higher than that with normal saline used as baseline).

Impression: positive for heparin-associated antibody via heparin-induced platelet aggregation method. • Positive heparin-induced thrombocytopenia (HIT) test results; also, results via enzyme-linked immunosorbent assay (ELISA) Heparin-induced platelet aggregation study results show significant increase in aggregation with heparin added (as much as 31% higher than that with normal saline used as baseline). Impression: Positive results for heparin-associated antibody via the heparin-induced platelet aggregation method. Note: results of heparin-associated antibody test via ELISA (March 14, 2008) were also positive. • Positive results on the dilute Russell viper venom (dRVVT) and hexagonal phospholipid (Hex PL) test, partial thromboplastin time (PTT) not corrected in mixing study Positive results for lupus anticoagulant.

Note: mixing study results show no correction for prolonged PTT. • Markedly-decreased aggregation with arachidonic acid (AA), adenosine diphosphate (ADP), collagen, and epinephrine Platelet aggregation study shows markedly decreased aggregation with AA, ADP, collagen, and epinephrine.

Aggregation with ristocetin is adequate. Impression: findings are consistent with platelet dysfunction. This pattern may be observed with: medication effect, uremia, platelet storage pool disease, myeloproliferative disorder, or Glanzmann thrombasthenia. Clinical correlation is suggested.

CPT: 85576 x5. • Baseline partial thromboplastin time (PTT) is prolonged, corrected with mixing Thrombin time is normal, at 20.7 seconds. Impression: results are suggestive of factor deficiency in the intrinsic pathway (factors VIII, IX, XI, or XII). In this 88-year-old woman, further testing for factors XI, XII, and von Willebrand panel (which includes factor VIII and von Willebrand factor) is suggested if clinically indicated. • Negative factor VIII inhibitor screen results Negative results for factor VIII inhibitor via screen panel, using 1:1 and 1:3 partial thromboplastin time (PTT) mixing study of control plasma and patient plasma. • Positive factor VIII inhibitor screen results Positive results for factor VIII inhibitor via screen panel, using 1:1 and 1:3 partial thromboplastin time (PTT) mixing study of control plasma and patient plasma.

• Negative factor IX inhibitor screen results Negative results for factor IX inhibitor via screen panel, using 1:1 and 1:3 partial thromboplastin time (PTT) mixing study of control plasma and patient plasma. • Positive factor IX inhibitor screen Positive results for factor IX inhibitor via screen panel, using 1:1 and 1:3 partial thromboplastin time (PTT) mixing study of control plasma and patient plasma.

• Normal aggregation with ristocetin Results of a platelet aggregation study with ristocetin show adequate aggregation with ristocetin at all concentrations. Impression: no evidence of von Willebrand disease or Bernard-Soulier syndrome. • Medication effect vs platelet storage pool disease Platelet aggregation study results show adequate aggregation with arachidonic acid and ristocetin and markedly decreased aggregation with adenosine diphosphate (ADP), collagen, and epinephrine. Loss of secondary aggregation is observed with ADP and epinephrine.

Impression: findings are consistent with platelet dysfunction. This pattern is suggestive of medication effect or platelet storage pool disease. Clinical correlation is suggested. If medication effect is not the case in this patient, electron microscopic study of platelets may be needed to rule out platelet storage pool disease. CPT: 85576 x5. • Deficiency in Fitzgerald factor or Fletcher factor Baseline partial thromboplastin time (PTT) is prolonged, corrected with mixing. Thrombin time is normal, at 19.2 seconds.

Subsequent assays for factors VIII, IX, XI, and XII all show normal results. Lupus anticoagulant results are also negative. Impression: results are suggestive of deficiency in Fitzgerald factor or Fletcher factor. Further testing for these factors is suggested if clinically indicated.

• Medication effect (including nonsteroidal anti-inflammatory drugs [NSAIDs]) Platelet aggregation study results show decreased aggregation with adenosine diphosphate [ADP], with loss of secondary aggregation. Aggregation with collagen is adequate. Specimen is of inadequate quantity for testing with ristocetin, arachidonic acid, and epinephrine. Impression: findings are consistent with platelet dysfunction. This pattern is suggestive of medication effect (including NSAIDs).

Clinical correlation is suggested. CPT: 85576x2. • Baseline partial thromboplastin time (PTT) is markedly prolonged, partially corrected with immediate mixing; no correction after 1-hour incubation (factor VIII inhibitor). Thrombin time is normal, at 16.6 seconds.

Impression: findings are consistent with an inhibitor in the intrinsic pathway. Subsequent testing shows very low factor VIII level (200 seconds down to 112.2 seconds); results of testing for factors VIII and IX show apparent increase in factor level with serial sample dilutions; factors VIII and IX are in the normal ranges with higher dilution, indicating the absence of inhibitors against these factors; and thrombin time is normal, at 17.0 seconds, which rules out heparin as an interference substance. • Negative dilute Russell viper venom test (dRVVT) results/negative hexagonal phospholipid (Hex PL) neutralization results Negative results for lupus anticoagulant with all tests performed. • Positive dilute Russell viper venom test (dRVVT) results/positive hexagonal phospholipid (Hex PL) neutralization results Positive results for lupus anticoagulant with all tests performed.

Thrombin time is normal, at 17.0 seconds, which rules out heparin as an interference substance. • Negative dilute Russell viper venom test (dRVVT) results/positive hexagonal phospholipid (Hex PL) neutralization results/platelet neutralization procedure (PNP) not performed due to normal baseline partial thromboplastin time (PTT). Nondiagnostic for lupus anticoagulant (normal prothrombin time [PT] and PTT). Repeated lupus anticoagulant testing is suggested at a later time if clinically indicated. • Negative dilute Russell viper venom test (dRVVT) results/negative hexagonal phospholipid (Hex PL) neutralization results/positive platelet neutralization procedure (PNP) results Borderline-positive results for lupus anticoagulant (prolonged partial thromboplastin time [PTT], borderline-negative dRVVT results, negative Hex PL neutralization results, and positive PNP results). Thrombin time is normal, at 17.0 seconds, which rules out heparin as an interference substance.

Repeated lupus anticoagulant testing is suggested at a later time if clinically indicated. • Positive dilute Russell viper venom test (dRVVT) results/negative hexagonal phospholipid (Hex PL) neutralization results/positive platelet neutralization procedure (PNP) results. Positive results for lupus anticoagulant. Thrombin time is normal, at 17.0 seconds, which rules out heparin as an interference substance. • Negative dilute Russell viper venom test (dRVVT) results/positive hexagonal phospholipid (Hex PL) neutralization results/positive platelet neutralization procedure (PNP) results Positive results for lupus anticoagulant. Thrombin time is normal, at 17.0 seconds, which rules out heparin as an interference substance. • Positive dilute Russell viper venom test (dRVVT) results/Negative hexagonal phospholipid (Hex PL) neutralization results/negative platelet neutralization procedure (PNP) results Negative results for lupus anticoagulant.

Thrombin time is normal, at 15.2 seconds, which rules out heparin as an interference substance. • Negative dilute Russell viper venom test (dRVVT) results/positive hexagonal phospholipid (Hex PL) results/Negative platelet neutralization procedure (PNP) results Negative for lupus anticoagulant. Thrombin time is normal, at 16.7 seconds, which rules out heparin as an interference substance. • Positive dilute Russell viper venom test (dRVVT) results/negative hexagonal phospholipid (Hex PL) neutralization/platelet neutralization procedure (PNP) not performed Nondiagnostic for lupus anticoagulant. Thrombin time is markedly prolonged (>100 seconds), which indicates heparin as an interference substance that prolongs dRVVT results. Repeated testing after patient has stopped taking heparin is suggested if clinically indicated. • Positive dilute Russell viper venom test (dRVVT) results/negative hexagonal phospholipid neutralization (Hex PNP) results/positive platelet neutralization procedure (PNP) results Nondiagnostic for lupus anticoagulant.

Thrombin time is markedly prolonged (>100 seconds), which indicates heparin as an interference substance. The positive PNP result is most consistent with heparin effect (false positive).

Repeated testing after patient has stopped taking heparin is suggested if clinically indicated. • Positive dilute Russell viper venom test (dRVVT) results/negative hexagonal phospholipid (Hex PL) neutralization results/platelet neutralization procedure (PNP) not performed Negative results for lupus anticoagulant (prolonged dRVVT, negative Hex PL results). PNP was not performed due to normal baseline partial thromboplastin time (PTT) of 34.3 seconds. Thrombin time is normal, at 18.9 seconds. Prothrombin time (PT) is prolonged, at 24.8 seconds. Lupus anticoagulant is unlikely, with normal PTT and prolonged PT. • Negative dilute Russell viper venom test (dRVVT)/positive hexagonal phospholipid (Hex PL) neutralization/positive platelet neutralization procedure (PNP) Nondiagnostic for lupus anticoagulant.

Thrombin time is markedly prolonged, at 60.4 seconds, which indicates heparin as an interference substance. The positive Hex PNP and PNP results are most consistent with heparin effect (false positive). Repeated testing after patient has stopped taking heparin is suggested if clinically indicated.

• Positive dilute Russell viper venom test (dRVVT) results/negative hexagonal phospholipid (Hex PL) neutralization results/platelet neutralization procedure not performed Nondiagnostic for lupus anticoagulant. Specimen quantity is insufficient for further testing (via PNP). Re-collection of specimens is suggested for a definitive diagnosis.

• Clopidogrel bisulfate effect Platelet aggregation study results show adequate aggregation with arachidonic acid, collagen, epinephrine, and ristocetin. Aggregation is moderately decreased with loss of secondary aggregation at a low concentration of adenosine diphosphate (ADP).

Aggregation is adequate at high ADP concentration, however. Impression: findings are consistent with mild-to-moderate decrease in platelet dysfunction. This pattern is consistent with medication effect (patient taking clopidogrel bisulfate).CPT: 85576 x5. • Prolonged partial thromboplastin time (PTT) with von Willebrand disease Baseline PTT is prolonged, corrected with mixing. Thrombin time is normal, at 16.6 seconds.

Impression: results are suggestive of factor deficiency in the intrinsic pathway. This is most likely due to low factor VIII level in this patient, who has a history of von Willebrand disease.

Correlation with factor VIII level and von Willebrand factor level is suggested. • Uremia or high gamma globulin concentrations Platelet aggregation study results show a moderate-to-marked decrease in aggregation to arachidonic acid, adenosine diphosphate (ADP), collagen, epinephrine, and ristocetin. Loss of secondary aggregation is observed with ADP and epinephrine. Impression: dysfunctional platelets.

The pattern observed in this study is not specific but it is often seen in chronic renal insufficiency or very high gamma globulin concentrations associated with some lymphoid or plasma cell neoplasms. Clinical correlation is suggested.

CPT: 85576 x5. • Normal platelet function Platelet aggregation study results show a decrease in aggregation with arachidonic acid (AA) at low concentration and normal aggregation with higher AA concentration. Aggregation with adenosine diphosphate (ADP), epinephrine, collagen, and ristocetin is adequate.

Impression: findings are consistent with adequate platelet dysfunction. The only decrease in aggregation with AA at a low concentration is unlikely to be of clinical significance. Clinical correlation is suggested. CPT: 85576 x5.

• Direct thrombin inhibitor Baseline prothrombin time (PT) and partial thromboplastin time (PTT) are markedly prolonged, not corrected with mixing. Thrombin time is markedly prolonged, at greater than 100 seconds. Impression: findings are most consistent with a direct thrombin inhibitor (such as argatroban). Clinical correlation is suggested.

• Aspirin ingestion or renal disease Platelet aggregation study results show decreased aggregation to arachidonic acid and adenosine diphosphate (ADP). Aggregation is borderline with collagen, epinephrine, and ristocetin. Loss of secondary aggregation is observed with ADP.

Impression: mild platelet dysfunction. The pattern observed in this study is not specific but it is typically observed with medication effect or chronic renal insufficiency. Clinical correlation is suggested. CPT: 85576 x5. • Medication or renal disease Platelet aggregation study results show decreased aggregation to arachidonic acid, adenosine diphosphate (ADP), collagen, and epinephrine. Loss of secondary aggregation is observed with ADP and epinephrine. Aggregation with ristocetin is adequate.

Impression: dysfunctional platelets. This pattern is suggestive of medication effect (including nonsteroidal anti-inflammatory drugs [NSAIDs]).

In this patient with end-stage renal disease, dysfunctional platelets due to uremia may also contribute to catheter bleeding at the catheter site. Clinical correlation is suggested. CPT: 85576x5. • Normal platelet function Platelet aggregation study results show adequate aggregation with arachidonic acid, collagen, epinephrine, and ristocetin. Aggregation with adenosine diphosphate (ADP) is decreased with low concentrations but normal at high concentrations. Impression: essentially normal platelet function. The decrease in ADP only at low concentrations is unlikely to be associated with clinical significance.

Clinical correlation is suggested. CPT: 85576 x5. • Aspirin and clopidogrel bisulfate Platelet aggregation study shows markedly decreased aggregation with arachidonic acid and adenosine diphosphate (ADP), moderately decreased with collagen and epinephrine. Loss of secondary aggregation is observed with ADP and epinephrine.

Aggregation with ristocetin is adequate. Impression: findings are consistent with platelet dysfunction. This pattern is consistent with medication effect (patient was prescribed a regimen of aspirin and clopidogrel bisulfate). Clinical correlation is suggested. CPT: 85576 x5.

• Normal platelet function Platelet aggregation study shows adequate aggregation with ristocetin at all concentrations. Impression: no evidence of von Willebrand disease or Bernard-Soulier syndrome. • Normal platelet function Platelet aggregation study results show adequate aggregation with all reagents tested (arachidonic acid, adenosine diphosphate [ADP], collagen, epinephrine, and ristocetin). No loss of secondary aggregation is observed with ADP or epinephrine. Note that only aggregation with ADP at low reagent concentrations is slightly decreased.

Impression: the overall aggregation results show no evidence of platelet dysfunction. CPT: 85576 x5. • Aspirin ingestion or renal disorder Platelet aggregation study results show decreased aggregation to arachidonic acid, adenosine diphosphate (ADP), collagen, epinephrine, and ristocetin.

Loss of secondary aggregation is observed with ADP and epinephrine. Impression: dysfunctional platelets. The pattern seen in this study is not specific but may be observed in chronic renal insufficiency or with medication effect. Clinical correlation is suggested. CPT: 85576 x5. • Factor deficiency in the common and/or in intrinsic and extrinsic pathways Baseline prothrombin time (PT) and partial thromboplastin time (PTT) are prolonged, corrected with mixing. Thrombin time is prolonged, at 64.4 seconds.

Impression: findings are suggestive of factor deficiency in the common and/or in intrinsic and extrinsic pathways. • Mild von Willebrand disease (vWD), most likely subclinical von Willebrand panel results show normal level of factor VIII (88%), von Willebrand factor (vWF) levels are slightly decreased (vWF aggregate, 46%), vWF functional, 48%). These results are suggestive of mild vWD, most likely subclinical.

Because the levels are borderline, repeated testing is suggested at a later time. • Factor inhibitor in intrinsic pathway Baseline prothrombin time (PT) is moderately prolonged, not corrected with mixing. Baseline partial thromboplastin time (PTT) is markedly prolonged, not corrected with mixing.

Thrombin time is slightly prolonged, at 23.6 seconds. Impression: findings are most consistent with an inhibitor. Further testing for lupus anticoagulant is suggested if clinically indicated. • Negative for lupus anticoagulant Negative for lupus anticoagulant with all tests performed (dilute Russell viper venom test [dRVVT] and hexagonal phospholipid neutralization). Note: previous lupus anticoagulant testing results were positive. These findings are indicative of transient lupus anticoagulant.

Repeated testing at a later time is suggested. • Nondiagnostic for lupus anticoagulant Nondiagnostic for lupus anticoagulant (prolonged dilute Russell viper venom test [dRVVT], negative hexagonal phospholipid neutralization results, and positive platelet neutralization procedure results). Thrombin time could not be performed to rule out heparin effect (due to insufficient specimen material).

Note that heparin may cause false-positive results for dRVVT and platelet neutralization procedure. Re-collection of sample is suggested. • Nondiagnostic for lupus anticoagulant Nondiagnostic for lupus anticoagulant (prolonged dilute Russell viper venom test [dRVVT] with negative hexagonal phospholipid neutralization). Platelet neutralization procedure was not performed due to normal baseline partial thromboplastin time (PTT), at 35.3 seconds. Prothrombin time (PT) is prolonged, at 20.4 seconds. The prolonged dRVVT results are likely due to vitamin K deficiency. Repeated lupus anticoagulant testing is suggested at a later time if clinically indicated.

• Medication vs platelet storage pool disease Platelet aggregation study results show adequate aggregation with arachidonic acid, collagen, and ristocetin, decreased aggregation with adenosine diphosphate (ADP) (only at low ADP concentration), and epinephrine. Loss of secondary aggregation is observed with ADP and epinephrine. Impression: findings are consistent with mild platelet dysfunction. This pattern is suggestive of medication effect. If medication can be ruled out, platelet storage pool disease may be considered. Clinical correlation is suggested. CPT: 85576 x5.

• Aspirin and clopidogrel bisulfate effect Platelet aggregation study results show markedly decreased aggregation with arachidonic acid (AA) (less than 4% on a 100% scale), and adenosine diphosphate (ADP) (less than 9% on a 100% scale). Impression: findings are consistent with effective inhibition of platelets by aspirin and clopidogrel bisulfate in this patient, who is taking both. CPT: 85576x2. • Negative for lupus anticoagulant Negative for lupus anticoagulant with all tests performed (dilute Russell viper venom test [dRVVT] and hexagonal phospholipid neutralization). • Platelet aggregation: not diagnostic due to marked lipemia and hemolysis Platelet aggregation study results show decreased aggregation with all reagents tested (marked decrease with arachidonic acid, adenosine diphosphate [ADP], collagen, epinephrine, and mild decrease with ristocetin). Gross examination of specimens revealed marked lipemia and hemolysis.

Impression: Nondiagnostic results due to marked lipemic and hemolyzed specimen. Repeated testing at a later time after lipemia and hemolysis have been resolved is suggested if clinically indicated.

Another option is to assess platelet function via thromboelastography, which is not affected by lipemia and hemolysis (whole blood collected in 1 blue-top tube). CPT: 85576 x5.

• Platelet aggregation: only decrease with epinephrine Platelet aggregation study results show adequate aggregation with arachidonic acid, adenosine diphosphate (ADP), collagen, and ristocetin. Aggregation with epinephrine is decreased. Impression: decrease in aggregation with only epinephrine (with adequate aggregation with all other reagents) has been described in patients who demonstrate no evidence of platelet dysfunction. The results of this study are not supportive of platelet dysfunction. Clinical correlation is suggested. CPT: 85576 x5.

• Nondiagnostic for lupus anticoagulant Nondiagnostic for lupus anticoagulant (borderline-negative dilute Russell viper venom test [dRVVT], positive hexagonal phospholipid neutralization). Thrombin time is normal, at 18.6 seconds.

Platelet neutralization procedure is nondiagnostic due to shortened partial thromboplastin time (PTT) of patient plasma with platelet phospholipid and also with normal saline. Repeated testing at a later time is suggested.

• Nondiagnostic for lupus anticoagulant Nondiagnostic for lupus anticoagulant (prolonged dilute Russell viper venom test [dRVVT] results, positive hexagonal phospholipid [Hex PL] neutralization results). Thrombin time is markedly prolonged (>100 seconds), which indicates heparin as an interference substance that may yield false-positive dRVVT results and Hex PL neutralization results. Repeated testing after patient has stopped taking heparin is suggested if clinically indicated.

• Negative for lupus anticoagulant Negative for lupus anticoagulant (normal dilute Russell viper venom test results, positive hexagonal phospholipid neutralization results). Platelet neutralization procedure was not performed due to normal baseline partial thromboplastin time (PTT) (32.2 seconds). Thrombin time is normal, at 14.4 seconds. Prothrombin time (PT) is also normal, at 13.7 seconds.

Lupus anticoagulant is unlikely with normal prothrombin time (PT)/partial thromboplastin time (PTT). • Positive test results for von Willebrand disease (vWD), mild von Willebrand panel results shows normal factor VIII and borderline levels of von Willebrand factor (vWF) (antigen and functional). Impression: results are suggestive of mild vWD. Clinical correlation is suggested. • von Willebrand disease (vWD), type II von Willebrand panel results show decrease in von Willebrand factor (vWF) functional level. VWF antigen level is borderline normal. Factor VIII is also decreased.

Impression: results are consistent with vWD. The discrepancy between vWF antigen and functional levels suggests vWD type II. Multimer testing is suggested for subtyping of vWD if clinically indicated. • Borderline-negative results for lupus anticoagulant Borderline-negative results for lupus anticoagulant (prolonged dilute Russell viper venom test [dRVVT] results, negative hexagonal phospholipid neutralization results, and borderline-negative platelet neutralization procedure results). Thrombin time is normal, at 22.1 seconds, which rules out heparin as an interference substance. Repeated testing for lupus anticoagulant is suggested at a later time. • Nondiagnostic for lupus anticoagulant Nondiagnostic for lupus anticoagulant (prolonged dilute Russell viper venom test [dRVVT] results, negative hexagonal phospholipid neutralization results).

Thrombin time is normal, at 17.3 seconds. Platelet neutralization procedure is nondiagnostic due to shortened partial thromboplastin time (PTT) of patient plasma with platelet phospholipid and also with normal saline. Repeated testing at a later time is suggested. • von Willebrand disease (vWD), type II von Willebrand panel results show a slight decrease in factor VIII and von Willebrand factor (vWF) antigen and a moderate decrease in vWF functional level. Impression: results are consistent with vWD.

The discrepancy between vWF antigen and functional levels suggests vWD type II. Multimer testing is suggested for subtyping of vWD if clinically indicated. • von Willebrand disease (vWD) type II, mild von Willebrand panel results show normal factor VIII and von Willebrand factor (vWF) antigen, mild decrease in vWF functional level.

Impression: results are consistent with mild vWD. The discrepancy between vWF antigen and functional levels suggests vWD type II.

Multimer testing is suggested for subtyping of vWD if clinically indicated. • Factor XII deficiency Baseline partial thromboplastin time (PTT) is prolonged, corrected with mixing. Thrombin time is normal, at 17.7 seconds. Impression: results are consistent with factor deficiency in the intrinsic pathway. Subsequent testing showed normal factor IX (85%), factor VIII (143%), factor XI (91%), and low factor XII (11%).

These results are diagnostic of factor XII efficiency in this 9-year-old male patient. • Mild medication effect (nonsteroidal anti-inflammatory drugs [NSAIDs]) Platelet aggregation study results show a slight decrease in aggregation with arachidonic acid and adenosine diphosphate. Aggregation with collagen, epinephrine, and ristocetin is adequate. Impression: findings are consistent with mild platelet dysfunction, most likely not clinically significant.

This pattern is suggestive of medication effect (most likely NSAIDs). Clinical correlation is suggested. CPT: 85576 x5. • Selective abnormality in collagen due to L-asparaginase Platelet aggregation study results show adequate aggregation with arachidonic acid, adenosine diphosphate, epinephrine, and ristocetin. Aggregation with collagen is markedly decreased.

Impression: findings are consistent with platelet dysfunction. Selective abnormality in collagen aggregation appears to result from therapy, with the use of L-asparaginase, in particular, being implicated. Clinical correlation is suggested. CPT: 85576 x5.

• Platelet dysfunction in patient with history of myelodysplastic syndrome [MDS] Platelet aggregation study results show adequate aggregation with arachidonic acid, adenosine diphosphate, and ristocetin. Aggregation with epinephrine and collagen is decreased. Impression: platelet dysfunction. Selective decrease in aggregation with collagen is suggestive of collagen-receptor defect.

Decrease in aggregation with epinephrine is nonspecific. Platelet dysfunction in this patient with history of MDS may be associated with this hematological disorder. Clinical correlation is suggested. CPT:85576 x5. • von Willebrand disease (vWD), type IIB Platelet aggregation study results show adequate aggregation with arachidonic acid, adenosine diphosphate, collagen, and epinephrine. No loss of secondary aggregation is observed.

Aggregation with ristocetin is adequate at high concentration and increased with low concentration (compared with that of normal control specimens). Impression: findings are suggestive of vWD, type IIB.

VWD panel results are suggested for definitive diagnosis if clinically indicated. CPT: 85576 x5. • Therapeutic results for antiplatelet medications in total artificial heart Platelet aggregation study results show markedly decreased aggregation with arachidonic acid, adenosine diphosphate (ADP), and epinephrine. Aggregation with ristocetin and collagen is slightly moderately decreased (most likely due to low platelet count of 74,000 after concentration; a control specimen with low platelet count is also run in parallel for comparison). Impression: findings are consistent with medication effect (in this patient who is taking aspirin and dipyridamole).

Current dosages of aspirin and dipyridamole appear to be adequate according to total artificial heart antiplatelet medication protocol (markedly decreased aggregation with arachidonic acid, ADP, and epinephrine but not with collagen). Findings were reported to Dr Y. Bai on September 10, 2012 at 14:30. CPT: 85576 x5. • Platelet aggregation with bivalirudin (all aggregations are suppressed, 13%–32%) Platelet aggregation study results show moderate-to-marked decrease (13%-32%) in aggregation to arachidonic acid, adenosine diphosphate, collagen, epinephrine, and ristocetin Impression: dysfunctional platelets.

The pattern seen in this study is most likely associated with the antiplatelet activity of bivalirudin (which this patient is currently taking). Clinical correlation is suggested. CPT: 85576 x5. • Aspirin effect Platelet aggregation study results show markedly decreased aggregation with arachidonic acid and moderately decreased aggregation with adenosine diphosphate (ADP) at low concentration, collagen, and epinephrine. Loss of secondary aggregation is observed with ADP and epinephrine.

Aggregation with high ADP concentration (50 μM/mL) is adequate (58%). Aggregation with ristocetin is adequate. Impression: findings are consistent with platelet dysfunction. This pattern is suggestive of medication effect (most likely nonsteroidal anti-inflammatory drugs [NSAIDs]; patient is taking 162 mg/day of aspirin). Clinical correlation is suggested.

CPT: 85576 x5. • Platelet aggregation, aspirin, and ticagrelor Platelet aggregation study results show markedly decreased aggregation with arachidonic acid, moderately decreased aggregation with adenosine diphosphate (ADP) at low concentration, collagen, and epinephrine Loss of secondary aggregation is observed with ADP and epinephrine.

Aggregation with high ADP concentration (50μM/mL) is slightly decreased (50%). Aggregation with ristocetin is adequate.

Impression: findings are consistent with platelet dysfunction. This pattern is suggestive of medication effect (most likely nonsteroidal anti-inflammatory drugs [NSAIDs] and ticagrelor; patient is taking 82 mg/day of aspirin, ticagrelor 90 mg twice daily). Clinical correlation is suggested. CPT: 85576 x5.

• Normal platelet aggregation at low platelet count Platelet aggregation study results show adequate aggregation with all reagents tested (arachidonic acid, adenosine diphosphate, collagen, epinephrine, and ristocetin). Note that the platelet count of the patient is low (66,000). The aggregation results for the specimen from this patient are compared with those from a positive-testing control specimen with a comparable platelet count (65,000). Impression: no evidence of platelet dysfunction. CPT: 85576 x5. • Total artificial heart (TAH), therapeutic range Platelet aggregation study results show markedly decreased aggregation with arachidonic acid, mild decrease with adenosine diphosphate (ADP), collagen, and epinephrine.

Loss of secondary aggregation is observed with ADP and epinephrine. Aggregation with ristocetin is adequate. Impression: findings are consistent with platelet dysfunction.

This pattern is consistent with medication effect (aspirin and dipyridamole in this patient with TAH implantation). The results indicate that antiplatelet medications are in therapeutic ranges for the TAH. CPT: 85576 x5. • Platelet aggregation, aspirin, no residual clopidogrel bisulfate Platelet aggregation study results show decreased aggregation with arachidonic acid, adenosine diphosphate (ADP), collagen, and epinephrine. Loss of secondary aggregation is observed with ADP and epinephrine. Aggregation with high concentration of ADP (50 μM/mL) is adequate (60%).

Aggregation with ristocetin is also adequate. Impression: findings are consistent with platelet dysfunction.

This pattern is suggestive of medication effect (most likely nonsteroidal anti-inflammatory drugs [NSAIDs]). Per electronic medical record review, patient is taking aspirin (325 mg twice daily) and clopidogrel bisulfate (75 mg twice daily). Platelet function of the patient is affected by aspirin but not clopidogrel bisulfate at this time. Clinical correlation is suggested.

CPT: 85576 x5. • Platelet aggregation, total artificial heart (TAH), need to increase aspirin dosage Platelet aggregation study results shows decreased aggregation with arachidonic acid and epinephrine. Aggregation with adenosine diphosphate (ADP), collagen, and ristocetin is adequate. Impression: findings are consistent with medication effect (aspirin and dipyridamole). ADP response is high for this patient with TAH implantation. Increased dosage of aspirin is suggested to keep antiplatelet medications in therapeutic range. CPT: 85576 x5.

• Platelet aggregation, total artificial heart (TAH) therapeutic range Platelet aggregation study results show markedly decreased aggregation with arachidonic acid and moderately decreased with epinephrine. There is also moderate decrease with adenosine diphosphate (ADP). Aggregation with high ADP concentration (50 μM/mL) is adequate (79%). Aggregation with collagen and ristocetin is adequate. Impression: findings are consistent with platelet dysfunction.

This pattern is consistent with medication effect (aspirin and dipyridamole in this patient with TAH implantation). The results indicate that antiplatelet medications are in therapeutic ranges per TAH protocol. CPT: 85576 x5.

• Platelet aggregation, aspirin, and uremia Platelet aggregation study results show decreased aggregation to arachidonic acid (AA), adenosine diphosphate (ADP), collagen, epinephrine, and ristocetin. Loss of secondary aggregation is observed with ADP and epinephrine. Impression: dysfunctional platelets. The decreased aggregation to AA, ADP, collagen, and epinephrine is most likely due to medication effect (this patient is taking aspirin). The pattern of decreased aggregation to all agonists observed in this study is not specific but it is typically observed in chronic renal insufficiency (this patient has a creatinine level of 4.0 and blood urea nitrogen level of 93). Clinical correlation is suggested.

CPT: 85576 x5. • Clopidogrel bisulfate effect Platelet aggregation study results show decreased aggregation with arachidonic acid, adenosine diphosphate (ADP) (all 3 concentrations), collagen, and epinephrine.

Loss of secondary aggregation is observed with ADP and epinephrine. Aggregation with ristocetin is adequate.

Impression: findings are consistent with platelet dysfunction. This pattern is consistent with medication effect (nonsteroidal anti-inflammatory drugs [NSAIDs] and ADP-P2Y12 inhibitor). The patient was taking aspirin and clopidogrel bisulfate before admission to the hospital on October 29, 2013. After admission, the patient took only aspirin. The decreased aggregation with ADP (49%) at high concentration (50 μM/ml) indicates the inhibitory effect of clopidogrel bisulfate. CPT: 85576 x5.

• Platelet aggregation, abciximab Platelet aggregation study results show markedly decreased aggregation with arachidonic acid, adenosine diphosphate (ADP), collagen, and epinephrine. Aggregation with ristocetin is adequate. Impression: findings are consistent with platelet dysfunction.

This pattern is consistent with the effects of abciximab, which the patient is taking. CPT: 85576 x5. Appendix 2 Thromboelastograph Templates • Normal Thromboelastography results are essentially within or close to reference ranges.

These indicate adequate hemostasis. If there is evidence of bleeding, consider anatomical or surgical bleeding. • Factor deficiency/heparin/coumadin Thromboelastography results show markedly prolonged reaction time (R value). This finding is suggestive of factor deficiency or anticoagulants. In case of factor deficiency, transfusion of fresh-frozen plasma is suggested (10–20 ml/kg body weight, or 4–6 U for an average adult).

• Thrombocytopenia/platelet dysfunction Thromboelastography results show markedly decreased value of maximum amplitude (MA). This finding is suggestive of severe thrombocytopenia or platelet dysfunction. For thrombocytopenia or other platelet defects, transfuse with platelets (6 U/70 kg body weight). • Thrombocytopenia/platelet dysfunction, mild Thromboelastography results show slightly decreased value of maximum amplitude (MA) ]. This finding is suggestive of mild thrombocytopenia or platelet dysfunction.

For thrombocytopenia or other platelet defects, transfuse with platelets (6 U/70 kg body weight). • Fibrinolysis Thromboelastography results show markedly prolonged value of lysis after 30 minutes (Ly30). This finding is suggestive of fibrinolysis, therapeutic (tissue plasminogen activator [tPA], streptokinase, or urokinase) or pathologic. For pathologic fibrinolysis, epsilon-aminocaproic acid (EACA) (5 g/70 kg body weight) or other antifibrinolytics is suggested. • Platelet hypercoagulation/fibrinolysis Thromboelastography results show increased values of maximum amplitude (MA) and prolonged value of lysis after 30 minutes (Ly30). These findings are suggestive of platelet hypercoagulation and fibrinolysis, therapeutic (tissue plasminogen activator [tPA], streptokinase, or urokinase) or pathologic. For pathologic fibrinolysis, antifibrinolytics are contraindicated because microvascular thrombosis may be exacerbated.

• Hypofibrinogenemia/thrombocytopenia/platelet dysfunction Thromboelastography results show decreased value of angle alpha and maximum amplitude (MA). These findings are suggestive of hypofibrinogenemia vs thrombocytopenia or platelet dysfunction. Transfusion with cryoprecipitate is suggested (6 U/70 kg body weight). For thrombocytopenia or other platelet defects, transfuse with platelets (6 U/70 kg body weight). • Factor deficiency/heparin/coumadin and hypofibrinogenemia Thromboelastography results show markedly prolonged value of reaction time (R) and markedly decreased value of angle alpha.

These findings are suggestive of factor deficiency (or anticoagulants) and severe hypofibrinogenemia. In case of factor deficiency, transfusion of fresh-frozen plasma is suggested (10–20 ml/kg body weight, or 4–6 U for an average adult). For hypofibrinogenemia, transfusion with cryoprecipitate is suggested (6 U/70 kg body weight). • Primary and secondary hemostatic disorders Thromboelastography results show markedly prolonged value of reaction time (R), markedly decreased value of maximum amplitude (MA) and angle alpha. This finding is suggestive of defects in primary hemostasis (platelets) and secondary hemostasis (clotting factors). Transfusion with multiple blood components is suggested: fresh-frozen plasma (10–20 ml/kg body weight, or 4–6 U for an average adult), cryoprecipitate (6 U/70 kg body weight), and platelets (6 U/70 kg body weight). • Platelet and enzymatic hypercoagulation Thromboelastography results show slightly shortened value of reaction time (R) and slightly increased values of angle alpha and maximum amplitude (MA).

These findings are suggestive of mild platelet and enzymatic hypercoagulation, which may be observed in early phase of disseminated intravascular coagulation (DIC). Monitoring for DIC using a DIC panel may be indicated. • Platelet hypercoagulation Thromboelastography results show increased values of maximum amplitude (MA). This finding is suggestive of platelet hypercoagulation.

Note: the platelet count of the patient is elevated, at 1031. • Enzymatic hypercoagulation Thromboelastography results show shortened value of rection time (R) and slightly increased value of angle alpha.

These findings are suggestive of enzymatic hypercoagulation. • Disseminated intravascular coagulation (DIC) with hypocoagulable state (stage 2) Transfusion with fresh-frozen plasma (2 U/70 kg body weight), cryoprecipitate (6 U/70 kg body weight), and platelets (6 U/70 kg body weight) is recommended. • Platelet hypercoagulation Thromboelastography results show increased values of angle alpha and maximum amplitude (MA).

These findings are suggestive of platelet hypercoagulation. • Thrombocytopenia or platelet dysfunction/fibrinolysis Thromboelastography results show markedly decreased value of maximum amplitude (MA). This finding is suggestive of severe thrombocytopenia or platelet dysfunction. Thromboelastography results also show markedly prolonged value of Ly30. This finding is suggestive of fibrinolysis, therapeutic (tissue plasminogen activator [tPA], streptokinase, or urokinase) or pathologic. It is suggested that in case of uremia, the patient should be prescribed desmopressin acetate (DDAVP) (0.3 μg/kg body weight). For thrombocytopenia or other platelet defects, transfuse with platelets (6 U/70 kg body weight).

For pathologic fibrinolysis, epsilon-aminocaproic acid (EACA) (5 g/70 kg body weight) or other antifibrinolytics is suggested. • Mild hypofibrinogenemia Thromboelastography results show slightly decreased value of angle alpha. This finding is suggestive of mild hypofibrinogenemia. Transfusion with cryoprecipitate is suggested (6 U/70 kg body weight). • Mild platelet hypercoagulation Thromboelastography results show slightly increased values of angle alpha and maximum amplitude (MA)).

These findings are suggestive of mild platelet hypercoagulation. • Enzymatic hypercoagulation Thromboelastography results show shortened value of reaction time (R). This finding is suggestive of enzymatic hypercoagulation. • Hypofibrinogenemia vs thrombocytopenia or platelet dysfunction, also hyperfibrinolysis Thromboelastography results show markedly decreased value of maximum amplitude (MA) and angle alpha, as well as markedly increased value of lysis after 30 minutes (LY30).

This finding is suggestive of hypofibrinogenemia vs thrombocytopenia or platelet dysfunction, as well as hyperfibrinolysis: therapeutic (tissue plasminogen activator [tPA], streptokinase, or urokinase) or pathologic. Transfusion with multiple blood components are suggested: cryoprecipitate (6 U/70 kg body weight), and platelets (6 U/70 kg body weight). For pathologic fibrinolysis, epsilon-aminocaproic acid (EACA) (5 g/70 kg body weight) or other antifibrinolytics is suggested. • Increased level of fibrinogen Thromboelastography results show increased value of angle alpha. This finding is suggestive of increased level of fibrinogen. • Normal Thromboelastography results are within reference ranges.

These indicate adequate hemostasis. If there is evidence of bleeding, consider anatomical or surgical bleeding. • Disseminated intravascular coagulation (DIC) Thromboelastography results show markedly prolonged value of R, markedly decreased value of maximum amplitude (MA) and angle alpha, and markedly prolonged value of lysis after 30 minutes (Ly30).

This finding is suggestive of defects in primary hemostasis (platelets) and secondary hemostasis (clotting factors), as well as hyper fibrinolysis, such as observed in DIC. Transfusion with multiple blood components is suggested: fresh-frozen plasma (10–20 ml/kg body weight, or 4–6 U for an average adult), cryoprecipitate (6 U/70 kg body weight), and platelets (6 U/70 kg body weight). For pathologic fibrinolysis, epsilon-aminocaproic acid (EACA) (5 g/70 kg body weight) or other antifibrinolytics is suggested. • Platelet hypercoagulation/hyperfibrinolysis Thromboelastography results show increased values of angle alpha and maximum amplitude (MA). These findings are suggestive of platelet hypercoagulation. Thromboelastography results also show prolonged value of Ly30.

This finding is suggestive of fibrinolysis: therapeutic (tissue plasminogen activator [tPA], streptokinase, or urokinase) or pathologic. For pathologic fibrinolysis, antifibrinolytics are contraindicated because microvascular thrombosis may be exacerbated.

• Platelet and enzymatic hypercoagulation/hyperfibrinolysis Thromboelastography results show shortened value of reaction time (R) and increased values of angle alpha and maximum amplitude (MA). These findings are suggestive of platelet and enzymatic hypercoagulation. Lysis after 30 minutes (LY30) is also markedly increased, consistent with hyperfibrinolysis. For pathologic fibrinolysis, antifibrinolytics are contraindicated because microvascular thrombosis may be exacerbated.

• Early phase of disseminated intravascular coagulation (DIC) Thromboelastography results show shortened value of reaction time (R) and increased value of maximum amplitude (MA). These findings are suggestive of platelet and enzymatic hypercoagulation, which may be observed in the early phase of DIC. Monitoring for DIC using the DIC panel may be indicated. • Hypofibrinogenemia and hyperfibrinolysis Thromboelastography results show decreased value of angle alpha. This finding is suggestive of hypofibrinogenemia.

Transfusion with cryoprecipitate is suggested (6 U/70 kg body weight). Thromboelastography results also show prolonged value of lysis after 30 minutes (Ly30).

This finding is suggestive of fibrinolysis: therapeutic (tissue plasminogen activator [tPA], streptokinase, or urokinase) or pathologic. For pathologic fibrinolysis, epsilon-aminocaproic acid (EACA) (5 g/70 kg body weight) or other antifibrinolytics are suggested.

• Platelet/enzymatic hypercoagulation and hyperfibrinolysis Thromboelastography results show shortened value of reaction time (R) and increased values of angle alpha and maximum amplitude (MA). These findings are suggestive of platelet and enzymatic hypercoagulation.

LY30 is also increased, consistent with hyperfibrinolysis. For pathologic fibrinolysis, antifibrinolytics are contraindicated because microvascular thrombosis may be exacerbated. The thromboelastography parameters are suggestive of an early phase of disseminated intravascular coagulation (DIC). Monitoring for DIC using the DIC panel may be indicated. • Enzymatic hypercoagulation Thromboelastograph (with heparinase) results show shortened value of reaction time (R). This finding is suggestive of enzymatic hypercoagulation. • Markedly prolonged reaction time (R) and markedly decreased maximum amplitude (MA), angle alpha Thromboelastography results show markedly prolonged value of reaction time (R).

This finding is suggestive of defects in secondary hemostasis (clotting factors) or anticoagulant effect. If patient is not taking anticoagulant medication, transfusion with blood components is suggested: fresh-frozen plasma (10–20 ml/kg body weight, or 4–6 U for an average adult). Maximum amplitude (MA) and angle alpha are also markedly decreased but these results are not diagnostic due to markedly prolonged R. • Heparin effect: markedly prolonged reaction time (R) and markedly decreased maximum amplitude (MA), angle alpha; all normalized with heparinase Thromboelastography results show markedly prolonged value of reaction time (R) and markedly decreased value of maximum amplitude (MA) and angle alpha. Thromboelastography with heparinase was performed, which shows normal values of all parameters (R, angle alpha, MAs). Impression: findings are consistent with heparin effect.

• Heparin effect: markedly prolonged reaction time (R) and markedly decreased maximum amplitude (MA), angle alpha; all normalized with heparinase Thromboelastography with heparinase was performed, which shows normal values of all parameters (R, angle alpha, MAs, Ly30). Thromboelastography (without heparinase) results show markedly prolonged value of R and markedly decreased value of MA and angle alpha. Impression: findings are consistent with heparin effect. • Normal results of thromboelastography (performed with heparinase) Thromboelastography (performed with heparinase) results are within reference ranges. These indicate adequate hemostasis; also, there is no evidence of heparin in the specimen. If there is evidence of bleeding, consider anatomical or surgical bleeding.

• Enzymatic hypercoagulation and thrombocytopenia or platelet dysfunction Thromboelastography results show shortened value of reaction time (R) and decreased value of maximum amplitude (MA). These findings are suggestive of enzymatic hypercoagulation and thrombocytopenia or platelet dysfunction. • Enzymatic hypercoagulation and hyperfibrinolysis Thromboelastography results show shortened value of reaction time (R) and increased values of angle alpha.

These findings are suggestive of enzymatic hypercoagulation. LY30 is also increased, consistent with hyperfibrinolysis. For pathologic fibrinolysis, antifibrinolytics are contraindicated because microvascular thrombosis may be exacerbated. The thromboelastography parameters are suggestive of an early phase of disseminated intravascular coagulation (DIC). Monitoring for DIC using a DIC panel may be indicated.

• Enzymatic hypercoagulation and thrombocytopenia or platelet dysfunction Thromboelastography results show shortened value of reaction time (R), increased value of angle alpha, and decreased value of maximum amplitude (MA). These findings are suggestive of enzymatic hypercoagulation and thrombocytopenia or platelet dysfunction. For thrombocytopenia or other platelet defects, transfuse with platelets (6 U/70 kg body weight). • Enzymatic hypocoagulation or anticoagulant Thromboelastography results show markedly prolonged value of reaction time (R). This finding is suggestive of defects in secondary hemostasis (clotting factors) or anticoagulant effect. If patient is not taking an anticoagulant, transfusion with blood components is suggested: fresh-frozen plasma (10–20 ml/kg body weight, or 4 U for an average adult).

Maximum amplitude (MA)and angle alpha are also markedly decreased, but these results are not diagnostic due to markedly prolonged R. Testing for fibrinogen and platelet count is suggested if clinically indicated. • Hyperfibrinogenemia and hyperfibrinolysis Thromboelastography results show increased value of angle alpha.

This is suggestive of hyperfibrinogenemia. Thromboelastography results also show prolonged value of lysis after 30 minutes (Ly30). This finding is suggestive of fibrinolysis: therapeutic (tissue plasminogen activator [tPA], streptokinase, or urokinase) or pathologic. For pathologic fibrinolysis (early disseminated intravascular coagulation [DIC]), antifibrinolytics are contraindicated because microvascular thrombosis may be exacerbated. Clinical correlation is suggested. • Heparin effect Thromboelastography results show markedly prolonged value of reaction time (R), markedly decreased value of angle alpha and maximum amplitude (MA). Thromboelastography with heparinase was performed, which shows normal values for all parameters (R, angle alpha, MA).

Impression: findings are consistent with heparin effect.