H G J Electronics

Spokane, Wash. 99206 1,00 wilf frame & display 60 QSL Cards in 3 of our 20 compartment plastic holders, or 3-00 gets 10 holders for 200 Cards. Order now eiimi-nate the mutilation & headaches of the obsolete methods, & have a neat, attractive shack instantly. Prepaid & guaranteed. Free sample available to Dealers, TepabCG, Box l98Nf Gallatin, Term* 37066

Columbia Electronics

LOS ANGELES, CALIF. 90019 (213) 938-3731 same and you must remember at some stops, the Custom fellows could not even speak English. Like I said quite a few lines back, here I was at the home of ZS6LM getting ready to go along with him over into Basutoland (ZS 8)- We had a small trailer attached to the rear of Lamberth's car. This was a small one and every single item was packed in it. I don't think there was enough room left for a flea to get in. That fellow Lam-berth...

To Scope

. . when marking your electronic equipment or making schematics or logic diagrams. INSTANT LETTERING dry transfers let you achieve the look of fine printing, quickly and with a minimum of effort. With INSTANT LETTERING marking kits you can completely mark equipment from component parts to the finished control panel. Dry transfer meter and dial markings, preset words, component identification letters, etc. are printed on a special transparent carrier sheet. Rubbing over one of these elements...

B R O P L E X

Sending becomes fun instead of work with the SEMI-AUTOMATIC Vi-broplex. It actually does all the arm-tiring nerve wrecking work for you. Adjustable to any desired speed. Standard models have polished Chromium top parts and pr ay base. DeLuxe models also include Chromium Base and red fin per arid thumb pieces. Five models to choose from, priced at 19.95 to the 24K Gold Plated Base llPresentation,, at 39.95, Ordi r today at your dealers or direct Why not send 25* (coin or stamps for a sample of...

Axm

Rush Order To RADIO AMATEUR CALLBOOK, inc. 4844 Fullerton Ave., Chicago, Illinois 60639 May be used 3 phase 0-240 volt or single phase 0-140 volt 60 cycle, 20 amp per section. Brand new as shown, lists over 200 Belt clip dosimeter. Scaled in Roentgens, 50-125-175300-450 Unused m i if a ry surplus 1+50 each Military gen, purpose DC milllame-fer w range selector switch 1-5-10100-500 mils. Gray aluminum cased with cover & patch cord. Govt, cost New catalog 66 now ready Send 25c handling &...

Rtty

Correction May 75 Equalizing AFSK Tones, Lamb K8ERV Going RTTY Part Four, DeMotte W4RWM The Semi-RTTY System, Kokjer K0JXO 9 (General Information About Amateur RTTY, Yocom WA0OBJ An IC Crystal Calibrator, Jorgensen K1DKC Tmnsistor Converter Notes, Jones W6AJF FET Transductance Tester, Fisk W1DTY VOM Transistor Tester, Thorpe An FET S-MeterT Olson W6GXN Getting Acquainted with integrated Circuits, Thorpe Using Low Cost FETs on Six, Jnnes WfiAJF Solid State Antenna Relay, Wright K2IYC Reactivator...

Ultramatic Systems Laboratory

Post Office Box 2143 Sunnyvale, California, 94087 We should give fair warning to those who order this new book from the Radio Society of Great Britain. Once you pick it up, you won't be able to eat, sleep, talk or wetch TV until you've read it ail. It's a fascinating, densely-packed, 100-page book full of every imaginable practical clr-cuit for ham radio. Hundreds of circuits and Ideas are discussed, and each one it useful to hems. Here are the chapters semiconductors, components and...

Orjek Zzai

341 5 West Broadway * Council Bluffs, lowo Zip 51501 SWAN 500 Transceiver SWAN Mobile Package SWAN 500 Fixed Station Package Enclosed is my Money Order Check Charge it Packages shown may l> e purchased on cash or terms. W rite for our tr ide quotes on these packages. 250 kHz to 29.75 WHi Stabbed Converter K5LL1. A phase-locked receiver with 500 kHz bands. So me experiments with Stacked Beams Ge+finq more qa n out of your array.

Namecall

L-I I -------------------X------------------- - ------------------J I I I I . . - Ap E. McGee, Jr K5LLI 2815 Materhorn Drive Dallas, Texas 75228 here are many advantages to the ham-bands only receiver- Good stability, a slow tuning rate, and accurate calibration are common in these receivers. Their greatest disadvantage is that they tune only a small portion of the Spectrum below 30 MHz. This converter was designed to eliminate this disadvantage by converting all frequencies from .25 MHz to...

Info

Unit uses a high-voltage keyer stage which will switch up to 300 volts. This high-voltage feature allows a full printing range to be obtained. The Pioneer 900 has a built-in bandpass filter, 250 Hz 6 dB selectivity per channel, complete metering, and consumes less than 10 watts. The input impedance is 4 ohms (others on request). The converter is normally packaged in a 0 inch high, 11 inch wide, 6 inch deep cabinet which is perforated. It is also available for rack mounting at a small additional...

Audio

Fig, I, Circuit diagram of the true parasitic monitor. he rf input is tapped directly onto the coaxial output connector of your SWR bridge. For power inputs over 250 wat s, a small pickup probe may be used. Fig, I, Circuit diagram of the true parasitic monitor. he rf input is tapped directly onto the coaxial output connector of your SWR bridge. For power inputs over 250 wat s, a small pickup probe may be used.

Some Experiments

For the amateur interested in DX, both the power output of the transmitter and the type of antenna used will be of prime importance in siting a signal to the desired location. Neglecting for the time being the general characteristics of the receiver itself, the antenna becomes equally important in reception of long-distant communications. In the pursuit of a rare DX contact, the frequency will, more often than not be jammed with stations who are running the legal limit which is not difficult or...

Signal Saver

A, Wicks WB6KF1 1208 Levin Avenue Mountain View, California 94040 in the past few years, the number of amateur mobile installations has increased at a tremendous rate. This has been accelerated by the availability of transceiver equipment, which is usually compact, presentable, and easily removed for a dual-purpose role of fixed or mobile. If statistics were available, and CB and boat installations were added, the total figure would no doubt be amazing. It would probably also be astonishing...

Forty Meter Vertical Array

With the increase in foreign broadcast activity in the forty-meter band, night-time operation has become difficult, if not impossible, in the eastern part of the country. The installation of a parasitic beam is one solution but it is expensive and presents many structural and support problems and was ruled out for this location. The three-element vertical all-driven array was the Final result of several months experimentation. In the time it has been in use, it has been found to consistently...

Nc

USED GEAR trial terms guaranteed. - 199.95 62S1 589.00 Thor VI AC G76 99.95 SR-150 269.95 Eico 753 SB2-LA 159.95 2B 189.95 HQ-170-AC HQ-110C 139.95 HT-37 199.95 HW12 HQ-180-A 299 95 Request free Blue-list of hundreds more. WRL, Box 919, Bluffs. Iowa 51501. MANUALS, 3.00 each AKN-6f ARN-12, ARN-30, ARC-27, BC-342, PE-75. Many others. Inquiries invited. Stamp please. S. Consalvo, W3IHD, 4905 Roanne Dr., Washington, D C. 20021, WANT, GUARANTEED like-new SP600JX 51J3, and HF receiver or general...

Wffr

Amateur licenses are being given out for the first time since Kenva came into its own. Look for a goodly group of 5Z4 s around the bands. Quite a need has built up in the last four years. India reports no new licenses issued for the last ten months. That country has enough trouble without further discouraging the development of electronics trained people . We have a few of these on hand . . . Bill Orr 2.85 ' S2.00 W6SAI 2.95 , 2.00 One each of these on hand,...

Alive

SWAN 350 with 117X Power Supply and 14X DC module. Transceiver can be used on AC or DC. AH cords with unit. Excellent condition 375.00 FOB. Bruce Adams, Box J, Lincoln, R.I. SHACK CLEANOUT Drake L-4 mint, 525. Millen Transmatch KW mint 85. Galaxy 3, AC amp DC slupplies, ext. PTO and mobile mount 300. SX73 like SP600 200. Waters 3002 patch never used 50. UTC-VM5 500 w. mod. xfrm and chart 25. All following items postpaid Ameco CN144 lt 14.IF and PS 30. Heath IT-21 tube tester mint 25. Heath 1T12...

Vwd

Cousins VE1TG Poor Man's Occasional Antenna, Baird W7CSD Seven Elements on Twenty, Cameron WA4WWM Buried Antennas for Emergency Communica- tions, Schultz W1DCG The Expanded Quad, Harris WA5KXY An Inexpensive DX Antenna, Krawetz WAGWUl The Miniquad, Lehrbaum WA2APT A FuU Size 7 MHz Rotary Qubical Quad, Morgan K6DDO W9AIW Experiments with Quad Antennas, Lanfranco IIRR The Half Quad Antenna, Lufkin W03H The Three Element Quad, Allender K8YIB A Litfht Four Element Quad for 20 Meters, Dennis KpPKN...

Thermistorvaristor We

40A and or 4L A 4 f DI 71631 Varistor 4 I D979G6 Varistor 2 each, 3 5 D170396 HF Pwr Meas. _____ 2 ea., 6 5 IC Bulb Time Del 2 l, 5 5 38 C 2 259 DB MTR Bridge 2 fla gt , 3 5 Octal Sockets Ceramic amp Molded 20 51 Scope Sockets, Assorted 4 304TL or B29 Johnson Socket 1-177 Hickok Type Tuhe Checker ____ 39 GE YYZ-i Decade Sealing Counter 35 Pirani Vacuum Gages 39 r'ESC Var. Puise Ten Step Delay Network TD. 5uSEC Z100 amp .05 to ,5, 25 AM-TI ME PROD 500cy Fork amp Amp, 30 VFCn Vibrator Feeder...

Aluminum Towers

After having complained about late delivery and poor wrapping of 73, I feel you deserve a good report when you have earned it. The September issue fl9S7 hi arrived on August 4th, and the wrapper was so toujzrh it was not even mussed The circulation department has earned a commendation for their success in remedying the old problem. Charles M. Crosa WB6SWJ Palo Alto, California Last night I assembled the globe which came to me as a gift for two year subscription to 73. The assembly of the globe...

Herbert W Gordon Company

Woodchuck Hill Road Harvard, Massachusetts 01451 Helping Hams to Help Themselves Hams visiting me are invariably impressed when I demonstrate my station, It consists of a National NCX-5 with a BTI Linear. The results are pure pleasure. Just about every station called is worked no matter where they are located. Obviously my antenna system has a great deal to do with my results, but whereas I have a choice of all transceivers, why do I use the National NCX-5 In a few words because I like its...

Element

8jk Antenna

Boom and element construction of the 8JK beam antennas used In the stacked-antenna experiments- Fig. 2. Boom and element construction of the 8JK beam antennas used In the stacked-antenna experiments- quad assuming we are comparing antennas of the same general size, such as two-element quad and three element vagi . Even at optimum antenna heights, the angle of radiation is not as low7 as may be desired and die most logical way to bring it down is to stack a second antenna over the first...

P

SWAN 350 with 117XC AC Supply late serial SWAN 350 with I17XC AC Supply old serial d SWAN 500 with 117XC AC Supply SWAN 250 with 117XC AC Supply DRAKE TR4, AC4, MS-4 DRAKE R4, T4Ar AC4, MS-4 NATIONAL NCX-5, MK II, NCXA old serial NATIONAL NCX-5, MK-II, NCXA late serial COLLINS KWM-2, 516F-2 above 9000 serial COLLINS KWM-2, PM-2 above 90P0 serial GALAXY V, AC Supply i 1 YOU CAN MAKE MONEY ON YOUR PRESENT EQUIPMENT AND RUN THE LEGAL LIMIT AS YOUR BONUS Carefully pack and insure and ship your gear...

Dx

Gus Part 19, Browning W4BFD art 20, Part 21, Part 22, Part 23, Part 24, Part 25, Part 26. Part 27, Part 28, Part 29, Part 30, Hamming VK9 Style, Gencuski VK9TG The QRZ Machine, Johnson W6MUR Some Commandments for DXing, Attaway K4IIF A Canadian Assault on FP3, Goldstein VE1ADH Trindade Island DXpedition, Roeha PY2BZD DXing, Green W2NSD 1 DXing, Green W2NSD 1 Six Hours With Blintz DXpedition, Ben-Basat SINPO and 3INPFEMO, Brandon DJGHZ The Shackcom, MacCiuer W8MQW A Little About Noise, Nelson...

E

Here's the best solution under the sun. If you haven't the room or the cash to swing a beam or if your wife doesn't appreciate the beam's beauty , how can you still get on the air With a Hy-Gain 14AVQ, the most popular vertical under the sun. And what about versatility A Hy-Gain I4AVQ goes along on virtually every DX-pedrtion ' Hy-Gain 14AVQ is constructed of high-grade heat-treated aluminum and uses high impact polystyrene. No need to worry about rust and deterioration common in others using...

Tunavertersii

10 to 2 meters for HF amp VHF AM-FM Marine, SW, and Polfte, Fire, etc J Tunable RF converters. For all auto and home radios Transistor amp i-l tuning See Complete listing in Apr, ' 7 73 ad, page 107. Dept. 79, Woodsboro, Texas 78393 HERBERT SALCH amp CO. TAB SILICON OWE AMP DIODES Atl Test f AC amp DC amp JW amp 1700 Piv 1200 Rms lt 3 750 Ma, 10 for 10 2400 PivM680 Rms gt 750 Ma. 6 for 11