Introducing The Transkey

The new Trans-Key (TM) is a new development for ham radio by licensed hams. A highly sensitive relay driven by 3 blocking oscillator offering variable speeds from a few words to 50 wpmN is but one interesting feature This eliminates worries about voltage polar ity or potential. The keyer and accompanying monitor are both penlight cell powered or an external 6 volt source can be used. The key contacts are adjustable. A single switch on the back changes opera* tion from automatic (self completing...

Sale

He Tristao Tower Company has just announced a new cranlc-up tower tiiat is especially suited for tlie ham with a problem installation the operator who wants his antenna 60 feet in the air but has little or no room for guys. The new Tristao CZ-454 tower is attached to a building 10 or 15 feet above the ground and has sufficient stiffness to support an average tri-bander beam when fully cranked up. The diagonal steel bracing and heavy channel step bracing provide the strength to withstand strong...

Info

FREIGHT PREPAID INSIDE CONTINENTAL U,S + A. 7182 RASMUSSEN AVE., VISALIA, CALIF. What basic circuit belongs 011 the amateur s workbench next to the RF signal generator, the frequency standard, and the dip oscillator Ans James Dandy Mixer Two frequently performed arid closely related tests are the measurement of frequency and the general assessment of stability and quality of an RF signal. Both tests usually involve mixing a good RF signal and a questionable RF signal for an audio output, and...

New Products

Tuck Model 103 High Frequency Exciter Tuck Electronics has just announced a new series of solid-state high-frequency exciters that provide 2 watts output over a frequency range from below 1 MHz to above 30 MHz without tuning. Although the Model 103 illustrated above has a two position crystal oscillator, other models are available with up to ten crystal positions. For the RTTY enthusiasts a special crystal oscillator is available with provisions for frequency shift. Complete details on this...

Translab

Sin Diet , Ctlif. 92102 Reduces Interference and W For ALL Amateur Transmit- Noiu on AM Males Short j ten. Guaranteed for 1000 Wave lietelwi. Makes World Watts AM 2000 & SB PI- Wide Reception Stronger. Met or Link Direct Feed. Clearer on All Bands Light, Neat, Weatherproof, Complete as shown total length 102 ft, with 96 ft. of 72 ohm balanced twinline. Hi-impact molded resonant traps (Wt 3 oz+ 1 i 5 baa). You just tone to desired band far teamlike results. EUcelteut for...

Bigk

1000 watt (p.e-p,j mobile intenna at a mini-power price Quick-connect high power inductors for 160*80-4020 15-11-10 meters have exceptional figure of merit MQ measures 230 on 30t rises to 3S0 on 15 meters Webster Invites comparison of ttili sky power antenna particularly its high efficiency space wound coils, suspended -not molded -inside a protective alE-white housing. Also compare the precision-machined hinged column assembly that releases coil whip tor right-angle lay-down. Lockup is fast,...

Kva

EM 6 KVAt 279.50 IncL Gen RadfO 1570AL EMT transistorized 28 KVA 230V . 350.00 ALL-BAND SSB HCVJt BARGAIN 11 all Icrafters K-15 AHR-7 55U kc. to 43 rnc rnntiimous. Voice, rW. MCW, Jilted, grid. W book 2 RF. 2-IF's. i gt -mHer nuts tmtr 3 jell, 3 uon-itl aelectiTitf choices, 140 cn Lese pwr sply 60 ey pwr sply 30, SSB produrt ilclt lor 20 TIME PAY PLAN Any purchase Uit.nl I n i n0 mure, down payment only . H . IU h DZ'X superhet revr 15-70 amp 100 1500 kc. . . 89.50 RAK-7 TRF revr w pwr sply...

A

Here's a simple, inexpensive transmitter for the beginner on 220 MHz Output is only half a watt, hut that can work a good distance, Inexpensive, low power transmitters have gained popularity through proven performance on 6 and 2 meters. Why not find just how little is needed on 220 MHz I thought- Perhaps it was a foolish I bought for many failures followed. The llA meter band borders on UHF, This tends to complicate circuitry. Tuned linos were not considered for the tuned circuits, hut it...

Technical School your Ham Training

Whether or not incentive licensing becomes the law, there are many amateurs who would like to improve their knowledge, either to get a higher license for the satisfaction of it, or as a means of entering the elect onics field. Novices and Technicians could find the way to General class licenses more easily by the formal training method, especially where they have no local hams to help them. Alexander Hamilton Institute 235 East 42nd. St. New York, N.Y. 10017 American Institute of Engineering...

The Chicken Method

Many articles have been written over the years extolling the virtues of some new tube or circuit application to improve existing equipment. The reader is often told in glowing terms how changing tubes in the frontend of his receiver will boost the signals so many Sw units or that the DX signals will really pour forth. On-the-air contacts will boast such changes with authority to all who will listen. Some tube and circuit changes that have made the rounds are well engineered and should be...

Five Bands Watts

So often when thinking of investing in a mobile rigf the thought occurs that it wilt have to be a cheap outfit, without many of the excellent features of the home station. Can't afford two rigs like the home station, you say This may be true, but when you have the combination that is designed for the job, the home station can be the mobile station, toor and the changeover simply a matter of moving the transceiver and VFO from the house to the can The SWAN 400 and its components fit together...

Parametric Amplifiers

I,- lt lt V' Ii, 4- 11 - - - y Is your VHF converter noisy Are you interested in working moonbounce on 432 How about OX on 1296 or 2300 If you're in the forefront of VHF and UHF developments, you are probably working well into the noise of your receiver. Even with many of the recent low noise transistor developments, short of a maser the PARAMETRIC AMPLIFIER is stifl the only way to get realty low noise figures above 300 MHz. PARAMETRIC AMPLIFIERS is the only book written explicitly with the...

Cau Direct Use Area Code

Butter 1, Missouri 816 679 3127 11240 W. Olympic, Los Angeles, Calif. 213 477-6701 931 N. Euclid, Anaheim, Calif. 714 772-9200 6116 N. 27th Ave., Phoenix, Ariz. 602 AM 4-3895 Worlds Largest Distributors of Short Wove Receivers External view of WA9AXX's digital readout VFO. Borje Ost WA9AXX T 526 Potter Road Park Ridge, III, 60068 External view of WA9AXX's digital readout VFO. Borje Ost WA9AXX T 526 Potter Road Park Ridge, III, 60068 It is desirable in tuned rf oscillators to have a uniform...

Wdfs

A chassis type male UHF connector can lie improvised by using a standard PL-259 and Liit KG-58 or RG-59 adapter to go with it. Drill a hole large enough to pass the adapter, then pass the adapter through the hole and screw the PL-259 on from the other side of the chassis. SLEEK amp FOLD-OVER ANTENNA amp COILS

Item Free

BOTH GIFTS FREE WITH 10.00 ORDERS 65 WATT 2N424 PLANAR, silicon, TO-53 npn, 30 4hKLrp IN DIODES ni titf ov Sylvania 1 IGNITION SWITCHING TRANSISTORS,ID AMP 4 2N33 6NPN SILICON transistors. TrnnstsLran 10 ZENERS REFERENCES tWW 2N998 TYPE, 1000 GAIN, npn -il . n. uliinar . -MICRO-T TRANSISTOR. J k IMT-I H. 6 TRANSITRON TRANS'TRS, lI, no tesu npa 4 TEXAS 20 WA TERS, Nl '3H-I0 12. w .ink 4 2N170 TRANSISTORS, by GE., npn for ffen'l if 6 TRANSISTOR RADIO SET, osc-ife. ihLver-pp . 25 GERMANIUM amp S...

Convenience Engineered Ham Gear

Another first from Waters Now, as easily as you switch from beam to dipoie P . . from 40 meters to 75, you can switch your entire an tenna system to ground with the newest addition to our line of coaxial switches, PROTAX, automatic-grounding coaxial antenna switch Designed with the same advanced engineering skill that outmoded all other coaxial switches two years ago, PRO AX is another giant step forward in Convenience Engineered ham gear by Waters. In effect, PROTAX is two switches in one a...

Uvc

Schematic of WA9IGU's grounded grid six meter linear amplifier. While WA9IGU uses it for AM, it could also be used for SSB. The cods are discussed in the text. The conlacts labeled SI ore port of the transmit-receive relay RLh not be essential but probably will save trouble later, lie three grid contacts on the socket are bonded directly through slots in the socket to chassis with the shortest possible copper straps. One-half inch copper strap is used from plate cap to the junction of...

Carl Cordover Module

K Schematic of the audio test amplifier. The amplifier module is a Carl Cordover and Co, PH-7 or equivalent, Lafayette sells similar modules. The first four requirements were met by using a commercial amplifier module and merely packaging it with a lew other items into a neat package. The other items'' include input jacks and gain control a power suppK and a speaker. I used six input jacks of different configurations in order to make the unit more versatile. Any number and type of jack can...

Denson Electronics Corporation

Box 85 Rockville, Connecticut Phone 203-875-5198 The new RCA Cransistor Manual, the SC-12, has been expanded by more than 20 per cent from previous editions. This new 480 page manual covers many new semiconductor devices and applications, a streamlined data section with more extensive data on active transistors, up-to-date transistor selection charts, and information on mounting hardware, mil-spec transistors and circuits. In addition, the SC-12 contains 145 pages of text which has been...

Sideband Engineers

Export tales Raytheon international Safes amp Services, Lexington 73, Mass. U.SA Bottom view of the six meter tmear. The Mtrnductor is LK The filament chokes L2 and L3 are bifilar wound on a Yz Teflon rod The electrolytic capacitors adjacent to the filament transformer are part of a voltage doubler circuit used to operate the relay. The Muffin fan rs mounted on the bottom plate. Bottom view of the six meter tmear. The Mtrnductor is LK The filament chokes L2 and L3 are bifilar wound on a Yz...

Sterba

Fig. 4, Bruce and Sterba curtom dimensions. For best results the tower element of each antenna should be elevated Va to Vb wavelength above ground- The dimensions are not critical, and if fed with a non-resonant line for one band operation, a low SWR will result over the entire band. Both arrays may be used for multiband operation on 10 and 40 if cut for 20 meters, for instance . The Sterba array will give slightly more gain on its design band and better performance at half-frequency compared...

U

Schematic of the tubeless VFO for six or two. CI is the tuning capacitor, 3-25 pF with a shaft, C2 is the bandsetting capacitor, 4-50 pF. C3 is a 220 pF mica capacitor. C4 is a 150 pF mica capacitor. L is 3 amp coil form with 8 turns of 1 8 Formvar on it. was needed at the unit so that the RG58L was tied into the VFO and the outboard em was provided with the cable connector. Note for six meters the VFO should start on i2.5 MHz rather than 8.333 MHz a unit for two should be on 12 MHz...

And Its High Frequency Crystal Lattice Filter

One of the reasons why the Swan-350 is the top selling transceiver today is its exceptional selectivity provided by a new crystal filter which we began installing in all production units a few months ago, This amazing little gem is made exclusively for Swan by C-F Networks, The selectivity it provides for voice communication is as good or better than the selectivity provided in any other sideband equipment, regardless of price. There are 3 important factors about a filter which determine what...

Bands Watts

NO FINANCE CHARGE IF BALANCE PAID WITHIN 90 D gt 4rS Pay as little as 10 down or use your trade in as a down payment. The remaining balance may be paid over a period of up to 36 months. No finance charge if paid within 90 days. Edwards has the largest selection of new amateur equipment in the Southwest. Drake, Swan, Galaxy, SBE, National, Hy-Gain, New Tronics and all the rest are always on hand for immediate delivery. Our central location enables us to give the fastest delivery. Excelient...

T

John Schultz W2EEY 1 40 Rossie Street Mystic, Conn. 06355 Build an easy-to-construct curtain array and work that DX Many amateurs who liave the space to erect an elevated 40 meter dipole can improve the performance of their antenna system on several bands and at minimum cost by erecting a small curtain type array. The advantages of curtain arrays in general are discussed and several construction hints are given as worked out by the author while constructing a small Bruce array, I transported my...

Kzzv

MATCHBOX Matches transmitter 52 ohm output impedance to balanced or unbalanced line. Provides unbalanced impedance to receiver. Complete band-switching, 80 thru 10 meters no plug-in coils, 275 WATT MATCHBOX 750 WATTS PEP Cat. No. 250-23-3 With directional coupler and indicator.. r 94.95 Cat. No. 250-23-i Less directional coupler and indicator____ 64.95 KILOWATT MATCHBOX 3KW PEP Cat. No, 250-30-3 With directional coupler and indicator. . , 154.50 DIRECTIONAL COUPLER AND INDICATOR Provides...