Info

-The above used equipment prices subject to 10 discount for cash no trade. Box 37A Wotertown, So. Dak. Phone 605 886-5749 America's Most Reliable Amateur Dealer. Collins, Drake, Eico, Hallicrafters, John Crawford WA4SAM George Webber WtDVG 40 Morris Street West Lynn, Mass. A one transistor converter for 28-54 or J08176 mc The following converter is your answer to a sensitive and inexpensive receiver for your car. When used with the usual car broadcast radio it will provide excellent monitoring...

Gus Part IX

At the end of Chapter 8 1 was on the island of Mahe with W0AIW, W0MAF, W0UQV and Harvey Brain, VQ9HB where we had all gathered for the purpose of going to either Agalega or Aldabra Islands. The boat had been chartered from Harvey. Plans had been made to have the boat ready for us to depart immediately upon our arrival from Mombassa, But the boat was a long way from being ready to leave. Some of us were at the point of wanting to go back to Mombassa because we discovered that it would be almost...

Free Heathkit Catalog

See the wide array of Heath kit Amateuf Radio Equipment available at tremendous do-it yourseif savings Everything you need in mobile' or fixed station gear with full descriptions and specifications , , . Send for Free copy Please send free 1966 Heathkit Catalog. Name___ - -_______ Prices & Specifications Subject to change without notice. AM-161

Works Gwp On Metres

INDOORS ZL4GA's JOYSTICK got him 569 on 3.5 mcs from G5WP on 21st February, 1965 at 0850 GMT, Alan had worked VE7BJY on 3,5 mcs at 559 and also logged 59 countries on 14 m cs by that date, including LUTHBS and 9M4LP. Testimonials continue io pour in read W70F's fantastic results' Partridge operate a rigid, 100 i Money Back Guarantee if you're not completely satisfied This ticket wili bring you the new brochures by return of mail I When a ham sees a Coveya 6, he says, It looks like a TV antenna...

Parametric Amplifiers

FK'l.l 'H ( < 4 'H'1' 3 FK'l.l 'H ( < 4 'H'1' 3 This book, the first on parametric amplifiers for the ham> is written for the average amateur and explains in simple language how they work, how to bulfd your own for the various UHF bands, and how to tune them up. Parametric* have helped UHF move into the space age, but don't forget that the first working parametric am* ptifier was built by W1FZJ and worked on six meters. Order this book direct, 2.00 postpaid, or from your locaf parts...

Gzl

HAM Wholesale Card Club Catalog Dept. If all you want to do is get some output on 432 mt the procedure is simple buy an MA-4062 and build a trip er to multiply your 144 mc transmitter output. If the object is to play with or demonstrate the use of variable-reactance diodes in frequency multipliers or other applications, there are cheaper diodes that will do the job very f ig, h Experimenting with varactors. 'his circuit uses a common silicon power diode to double from 80 rn to 40 m. well, at...

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Tan 45 Feb 90 M.ir 25 Milt 26 Mar 50 Mar 62 Apr 44 Apr 45 Apr 46 Apr 46 Apr 56 Apr 82 nl 52 id 62 ul 62 Aug 22 Au 26 Aug 26 Aug 41 Sep 44 Oct 90 Oct 111 Oct 113 Oct 116 Oct 117 Nov 30 Nov 32 Nov 40 Nov 104 Nov 104 Nov 105 106 Nov 108 Nov 109 Nov 121 Dec 92 Hix 98 , Dr lt 99 Construct ion Components, Workshop and Layout Tegboard panacea, K6UGT j , . Jan 27 Pr 'essjonal touch Feb 23 lost a piece of wire , K5BLF Feb 56 Printed circuits-almost, W3ITO . lt . . Mar 44 Kitchen heat sink, W0CGQ Jun 46...

Western Radio

N KYY TS73S UPM11A h,Tf H gt Kmc with most accessories WE CO GS16741 K 5 Sysltm Computer Calibrator , Ball.intine 300 AV VTVM in ly inch linck Panel . Lambda 28 Elect. K iiUihii Luh Power Supply APR9 Control for switching TNI 28 J 29,130. T61A AXT2 TV Xmtr w Vidco amp tiyncMnilululurH RT82 APX6 makes 1215mc xceivr. See Oct-Nov CQ. . NEW 23 Alum. Cabinet, B7 Sloping pjmel Jtliove iluor be tow desk shelf. Castors. Rear door H0V60cy exbatist ran 75 UPM8 floats...

Rtj

Melvin Leibowifz W3KET Charles Poppas W3TND Wilmington, Delaware The authors recently completed an EICO 753, tri hand SSB-AM-CW transceiver kit. The kit sells for 179,95 and in our opinion it W worth every penny, Power input is 200 watts PEP on SSH and CW and 100 watts on AM, Full frequency coverage of the 80. 40 and 20 meter hands is provided, The receiver section has an offset tuning control so that it can he detuned a few kilocycles from the transmitted signal in case the other fellow drifts...

Broad Band Balun

Flat in the amateur bands from 3 to 30 Mcs, Full legal power Fully weather sealed Motches coax to antenna or balanced tme. Improves efficiency and radiation pattern. Two models, 1 to 1 or 4 to 1 impedance ratio Sire 1V4 00 x 4 long. Wt, 4 ox, FUGLE LABS 1835 Watchung Ave., Plainfield, N.J T20 4-5.3 mt ARC5 Transmitter S5.95 T21 5.3-7 mc ARC5 transmitter 5.95 MD7 ARCS plate modulator 5.95 Transformer HOY AC primary, 12VAC secondary, ARX-6 transponder less tubes 1212 mc 59,95 Navy beam filter...

Esz

Should connect an equalizing circuit such as that of Fig. 12 betwen the oscillator and the scope adjust for a clean pattern. To check for perfect linearity the most informative technique is to sample a little rf SSB ahead of the amplifier, and a little more after it, then compare the two samples. This is easily done with a scope and two linear detector units. Fig, 13 shows the circuits of the two detector units, while Fig. 14 shows the test setup in block-diagram form. Such a setup can be...

Plugin Ouncer

Hipermalloy ShieJd 0 17 shown slipping For over thirty years UTC engineering and production talent has pioneered the development of high quality transformers, inductors, electric wave filters, magamps and high Q coils. The UTC OUNCER series represented a break through in the reduction of size and weight. 0 series units are fully impregnated and sealed in drawn aluminum cases. Highest quality characteristics are inherent in the conservative design. With frequency response from 30 to 20,000...

1

Generator, set to the mark and space frequency respectively. To simulate QSB on the air, the output ot each audio oscillator is made vari able, To simulate interference , each oscillator can be turned on continuously, i his feature makes the unit useful in SSB and AM transmitter modulation checks. The tones are very clean sinewaves, at over one volt out. And just so the unit does not collect dust after that perfect terminal unit is built, it can be changed to an AFSK simply by slaving the...

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Transistort Microamper Meter

Sensitive meter movements are the backbone of all accurate electronic measurements but their expense limits their use to all but the most costly instruments. If you have priced a 0-25 or 0-50 microampere meter in the past few years you know liv inexpensive meter amplifiers are useful. At one time sensitive meters could be obtained quite inexpensively on the surplus market, but nowadays even surplus meter prices are prohibitive. With transistors it is quite easy to build a meter amplifier that...

Phono Jack

CI con be 100 to 000 pf ing a small square of copper foil near and up it. Do this while watching an RF meter, such as the one described later in the article. LC and LB are spaced half an inch from the base plate and 5 16 inch from each other, Cl's ground connection is a half inch wide copper strap about inch long. The shortest possible leads were used on the transistor. use very small pliers to hold the leads close to the case and have had no trouble so far. The RF...

VFO Stability Part II

The article by W6BUV on VFO stability1 is excellent reading for anyone thinking about exploring tliis area of ham activity. Having been active in the RF oscillator field for almost 20 years, i wish to add a heart Amen ' Personal experience with vacuum tube oscillators gives Hie nod to the Clapp using a Telefunken 6AU6 or the Roblierson2 running at 2v dc on plates and heaters of a 12AU7 Telefunken and 12EC8 untuned buffer cathode follower. Each will hold frequency close to lx 0 5 with careful...

Knight Kit C Compressor

Hams have long known the advantages ol compression in the modulation dI a transmitter. You can look back at old handbooks and see the very complex and cumbersome equipment tliat used to be necessarv to add coma pression to a transmitter Then you can look at tlie neat, compact Knight C-577 and see how far we've come. This simple, easy-to-build compressor preamplifier connects between your microphone and transmitter mike input in a few minutes. Then it can be switched in and out of the circuit...

Texas

FOR OUR SPRING BARGAIN CATALOG ON Semiconductors Poly Paks JTl1 Paris I1 H R M3 send riieck, money I r r gt iYii r, im lt3de pnstftiro ave. wt. I J W rep link 1 Ih. Ratetin not i30 iiays. fc fca 1 ci D PAK KING OF THE WORLD Oscar III orbit computor, W7SMC Mar 20 Scope pix trix, K6UGT Mar 48 Trans form ex noise Jul 62 Parallel resistors, WA2BWQ Aug 76 Clean that bug Dec 109 Conalrad Not EES Yes K3RXK Ian 38 Ham and CD, W5CZ Feb 58 Improved halo mount, K3JZH Mar 84 2 kw mobile, W2DMK Oct 6 Bumper...

Rtty

Corrections in errorless RTTY converter, K5JKX . . Feb 72 Garden City TU. W7CJB . Mar 16 Novel AFSK oscillator, K8ERV Apr 66 Toroid letter May 99, Jun 18 FSK VFO, W6TKA Tun 18 Scope monitor Aug 12 Pattern distortion Aug 43 Teletype tester . , . Aug 60 Twin City TU improvement Nov 104 Parametric-xistor multipliers, W6 UD RF power amp, design, WA2DfO . . Simplified solid state, WA2INM Switching with d xles. K1SDX Are 20 tf xistors coining W7SMC . . Transistors for hams. WA6BSO . - . . Tan 12 an...

Wainm

The transceiver as built in the Gold Plated Test Oscillator cabinet, Using a neater cabinet is permissible. The transceiver as built in the Gold Plated Test Oscillator cabinet, Using a neater cabinet is permissible. In the Gorges of Dodes. Left to right, CN8BS, Mrs Peycelon cooking the picnic, CN8BC and Mr, Pey-eel ont In the Gorges of Dodes. Left to right, CN8BS, Mrs Peycelon cooking the picnic, CN8BC and Mr, Pey-eel ont Ei M. Wogner G3B1D 5, Ferncroft Ave. London, NW3, England 'here are many...

Of Old Receivers

There are a number of commercial ham band or general coverage receivers and military surplus receivers which cover the 6 meter band, W hile some are hotter than others, practically none of these yield performance bare-loot as good as that obtainable with a preamplifier or converter using a low noise rf tube. While a preamp is not too expensive, it is a nuisance when ch mging bands, and in many locations the additional gain is an embarrassment rather than an improvement because it intensifies...

Tucker Tin Ssb Transmitter

Signal is sampled and used for automatic gain control, to prevent limiting in the linear amps. This exciter is a filter type, and has been highly popular with those likiog filter exciters. One of equal popularity among the phasing set was W2EW L s Cheap and Easy SSB ' originally described in QST for March, 1956, The block diagram of this unit appears in Fig. 2 the schematic is in the ARRL publication mentioned earlier. Like the W61 luV rig, this uses a conventional audio pre-amp without about...