Dx Letters

Amateur operation here in Germany lias been a pleasure I never thought it could be back home. Or course, we have our shared bands with commercial services lots of QRM (some of it intentional) and certain restrictions, but you don't need a KW to work in DXer's Heaven. One thing we do tack is a Third Party Agreement between the U.S. and Germany no phone patches arc allowed. We would like to hear more Stateside stations calling Europe on 80 meters. Although our band stops at 3800 kHz. the portion...

Info

10.00 Minimum billing on credit cards BankAmericard or Master Charge onfy. I hereby authorize this purchase to be charged to my account as indicated 2 Never Say Diew2NSD l 5 Modern VHF SlVf06 Part 2 of 3. This will be followed by a frequency 52 social Events synthesizer as part of the system. 53 ox News 15 Solid State VHF 55 50TmhS b ci FM again Wel1' actual V any VHFer should enjoy 56 Microwaves building this experimental amplifier. Looks ideal to beef 59 New Products up the new I...

Freck Radio Supply

38 Biltmore Ave., Asheville, N.C. 28801 Large Stock of Used Equipment. FREE list upon request. We stock Collins Drake Galaxy Kenwood Signal One*Swan Tempo Hy-Gain Newtronics Several Others. Tenny Freck W4WL - Sandy Jackson Mgr. Harvey Nations W4VOV MINIATURE SUB AUDIBLE TONE ENCODER Compatible with all sub audible lone systems such as Private Line, Channel Guard, Quiet Channel, etc Glass paxy PCB, silicon transistors, and tantalum etecifo lytics used throu9hout Any miniature dual coil...

Power

Interest in amateur mobile communications lias recently been stimulated with the increasing availability of retired commercial FM equipment. For many years the workhorse of Hie mobile power supply has been the mechanical vibrator. Semiconductors that are capable of handling the same task with increased efficiency and dependability are available commercially. Ali preliminary design goals were exceeded in operation of this solid state vibrator replacement. The necessary prerequisites were Simple...

See Mobile

Getting HEP to IC's-K6MVH 56 Jan IC recover accessory W3E E Y 76 Jan New approach metal locator W6HDM 10 Feb Code oscillator w just 1 IC-K6MVH 53 Feb Perf-board terminal K6LL 83 Feb The fow-Ohm meter W3YZC S7 Feb IC 6 meter converter-WB4KMB 16 Mar Digital counters W0LMD 26 Mar Something new in PC constr. K6MVH 61 Mar The mod 2 digital ID unit-WB6BFM 49 Apr Build your own 2m FM-K1CLL 60 Apr The meter evaluator Marovich 116 Apr Varactor modulator to go FM-WA9TFY 121 Apr Low cost signal source...

Fm Repeater Circuits Manual Hadrbound Edition

This 300-plus page book has material on basic FM repeaters, national standards for FM repeaters, carrier operated repeaters, tone decoders for repeaters, controlling repeaters with tones, improving repeater intelligibility, minimizing desensitization, solving intermodulation problems, digital identification, the WB6BFM identifier, a computer-optimized digital identifier, WAOZHT design data, the Curtis identifier, the K6MVH autopatch, the Zero DKU autopatch, the touchtone autopatch, setting up a...

Taylor Rso Low Pass Filter

FOR SALE HEATH KIT compact kilowatt HA-14 linear, good condition. and homebrew power supply SI 10. W2KPE 147-11 76th Ave Flushing NY 1367, TALKIE complete with crystals for 04-64, 16*76. and 94-94. 'Also includes desk stand charger and nicad battery. S315 value* Brand new. First check for S250 geis the whole package. Under manufacturers warrantee . Radio bookshop. Peterborough, NH 03458, CLEANING OUT SHACK garage and attic. Six new surplus 6C21 nodes, misc. XMfr s, chokes, caps & tals. List...

Or Minitron Incandescent

Readouts only not reo d for led readouts on the same board as the rest of the counter unless you like to look down from above. The best way to mount them is on a small etched or perforated board which stands up vertically right in front of the main p.c, boardPower Supply (Figs, 17 and 18) A good power supply is a very important part of any digital system. It must be well filtered and welt regulated, since integrated circuits are very sensitive to noise on the power lines. Most important, the...

Signetics Phase Lock Loop

NE561B Phas Lock Loop 4.75 NE562B Phase Lock Lood 4.75 N5111A FM IF Demodulator 1.50 NE566V Function Generator . 4.75 NE567V Tone Decoder . 4.75 PREMIUM QUALITY TEXAS INSTRUMENTS TTL IC'S 7447 7-seg. decoder driver for the digital readout 1.65 74H00 high speed gate 96 7401 same as 7400 except open collector . . .29 7402 Quad 2-input NOR gate 29 7404 Hex inveter 29 7405 Hex inverter .29 7410 Triple 3-input NAND .29 7420 Dual 4-input NAND 29 7441 NIXIE driver 1.65 7490 decade counter 95 7475 quad...

Qbw

Our station here is ABM US A, Command Control Station for MARS Army in Vietnam, We've go about 25 Stations over here receiving your mag each month, and it is certainty appreciated by all of them, it' you can judge hv the comments on the in-country net after the new issue arrives. We also get CQ and QST both of which arc greeted by loud yawns on frequency. Thanks for the article a month or iwo back on MARS phone patches. We were beginning to think hams had never heard of MARS for the most part....

M

When you convert your Astatic G Grip-to-talk Stand with a TG Adaptor Kit, or UG8 Stand with TU Kit, you obtain impedance match and gain control. A complete, new T-UG8 Stand does the same thing for you. Without buying a new mike, you still have the finest that money can buy. Kits and T-UG8 Stand provide sufficient level to fully modulate transmitters with any Astatic Plug-in Mike. Volume control under base adjusts with screw driver to prevent over-modulation from absent-minded fiddling or...

Weey

5200 Panama Av ., Richmond CA USA 94804 THE ONLY QSL BUREAU to handle all of your QSLs to anywhere next door, the next state, the next county, the whole world. Ju t bundle thorn up please arrange alphabetically and send them to us with payment of eauh. 508 East Washington St., Areola, Illinois 61910 Also, trunk tid mount Installs quickly with only a screw driver. Surprising signal results are received using a small spring and resonator only mounted on the 3 8-24 stud no mast section is required...

Are You Taking Meters

Hawaii repeaters have been expanded with a view towards better coverage of the islands and better service for the visitor. on the same frequencies on Tuesday evenings at 8 PM Eastern. Army MARS stations use the prefixes A, AA, AD or AL before their usual district number and final letters, i.e. W4SCF is A4SCF in Army MARS. Air Force MARS stations are identified by AF prefixes, while the Navy MARS program utilizes N prefixes. A brochure outlining the MARS operation will be sent to those who are...

Megger Model G

Mfgd. by Wilslow Co. his is a brand new hand crank type for checking all types electrical equip, and rnsulatron test comes in a carrying case with Jeads amp manual. . . . S75.00 RA62 AC Supply for 522 but will also power ARC3 amp ARCS. etc. Wt. about 50 lbs, . . 9,95 HP608 D Signal Generator. Cherry condition, Like New 750,00 or will trade PRC6 banana shaped Army WALKIE TALKIE Freq 47 to 55 MHz. Compact amp light. PRC10 back pack type WALKIE TALKIE size 9x10x3. Frequency range 38 to 55 MHz....

MPFI

Schematic of a converter for 144 or 220 MHz illustrates the use of the MPF102 JFET as a multiplier. Note that it is necessary to tap down on the coil to achieve proper injection voltage. Tuned circuit values will be found in Tables I IV. should be carefully sealed from one another. The converter diagrams illustrate the kind of layout required as well as the use of feedthrough capacitors. Mixers shown use the Motorola MFE3008, while the rf amps use the MFE3007. RCA manufactures a wide...

ANTENNA

Parabolic beam for 10,15,20m - WA2SJ2 66 Jan Inverted attic antenna-W2SF 31 Jan Tuning all-band vert, antennas W5QKG 86 Feb Trap-type vertical antenna W2EEY 18 Mar The coathanger groundplane-K6MVH 72 Mar A big signal on 75m mobile-W6M0G 14 May EvaJ, Swan's 2 amp 6m antennas-WA6CPP 90 May Driven vs parasitic ant. el, WW6AJF 1 2 Jan Three squares for two-KSCFV 18 Jun Add'I frequencies w dipoles-W9EGQ 26 Jun Weather balloon vertices-K4EPI 32 Jun Xmttr tuning mobile am.-W2EEV 44 Jun Practical 40m...

Collins Mech Filters Z

Want tuner assy, for TS-497 Sig. Gen. state condition and price. WB6IQS, PO Box 4255 Palm Springs, CA 92262, HAM FESTERS 38th Hamfest and Picnic Sunday, August 13, 1972, Santa Fe Paifc, 91st and Woli Roads, Willow Springs, Illinois, Southwest of Chicago- Exhibits for ONfs and XYLV famous Swappers Row. Information and tickets, Joseph W. Poradyla, WA91WU, 5701 S. California Ave. Chicago IL 60629. FLASH EUROPE ORGANIZES FM WITH 600 kHz SPLIT Just got a telephone call...

Kenwood Tss Transceiver

I get equipment jitters every couple of years of so and when that time came around recently I was determined ro purchase an uncompromising transceiver usable with good effectiveness on both CW and SSB and be satisfied with it lor more than a couple of years. After four months of operation, ji appears 1 made a good choice. Advertising in 73 affected my decision. I ordered my rig sight unseen, since my dealer in Muskegon did not have a unit on display. I waited four long weeks for delivery due to...

See Tv

Ham radio mfg, A struggle-Staff 35 Jan Repeater zero beater-W1ELU amp W11RH 52 Jan Basics of surplus FM-WB2AEB 64 Jan Two tone units for rptr. use-VE2BZK 36 Feb 220 MHz conv, for FM pocket rcvrs-KlCLL42 Feb To the repeater on skis K6MVH 54 Mar Repeater audio mixer W1ELU 57 Mar What's different about FM-K6MVH 1 2 Apr Techno.locusts plague rptrs. W6YAN 20 Apr Hotrodding Motorola's H-T's-W7PUG 28 Apr Stability without crystals-Staff 30 Apr Microwave for repeater links - Lenkurt 34 Apr Mod...

Reperforatortransmitter

Tape printing amp punching, also transmitter-distributor, 115 volts, 60 eye. shpg. wt. 90 lbs. Used, excellent cond., gov't cost 2,000 59.50 Consists of rec -trans, RT11-A and TD-169 indicator. The transmitter interrogates a remote radar beacon by pulse type RF signal, pulse reply from beacon is received and displayed on the indicator to show distance and left or right headmg for horning to location of remote beacon The rec.-trans, contains 1 24 V.D.C. gear-head motor, 1-blower and tubes 2x2....

Panoramicreceiver

R356 AFIR S 290 520 MHz Tuning range in 2 bands - Directly covers 420-450 MHz Ham band, AM. Contains 5 stage, 52 MHz f F Amp, power supply module, tuner with motor driven sweep capacitor, 2 mixer sections, 2-R.F, pre amps and tubes 3JP1 - C.R.T., 183, OA2, 6AK5, 5654, 6096, 6097, 5Y3, 2-6AK6, 2 6AL5W. Power input 115V, 400 cy. Also available 7 0 300 MHz and 73Q-960 MHi, Excellent condrton. wt.40 18.95

Repeaters In Europe

A status report with some vacation planning tips- The rapid growth of repeaters in Europe and the fact that temporary operating licenses can be obtained by U.S. amateurs in many European countries opens the way tor the U S. amateur visiting Europe to enjoy VHF FM operation. The advantages of such operation as compared to carrying along HF gear are many. First of all, the equipment itself that is required is relatively simple. Any number of the commercially available or ho me-built transceivers...

Vhfconverters

We manufacture a complete line of converters for 50 through 432 MHz. Models to suit all needs. DX, FM, ATV, MARS, etc. A postcard will bring our new FREE CATALOG with pictures, schematics, specifications and prices. . i Succasunna, N.J. 07876 LABORATORIES TEL 201-584-6521 NEW Alpha 77A- now by CMl New 8877 final THE linear for THE CX7-A. YOU will never know how little it costs to own THg incomparable prestige CX7-A or ALPH A77A untiT YClU write or phone us the trade-in deal YCflJ WAf T. We...