Polyphase Instrument Company

Commercial products division bridgeport, pennsylvania Ask your Distributor for PIC Components, quality-engineered since 1948 Runs T.V Lights, Recorders. Public Address. Tools, etc. In Your Auto, Trailer, Camper or Boat Getting back to the accuracy, if I were to tell you what the meter would read with such and such a lamp, and a given power input, your calibration would be off ten to twenty per cent when the construction was finished. The > est way of getting a good calibration is something...

Znt

Schematic of the modern i 00 kc calibrator Let's get modern about this thing. After all with a little shopping around, for example see some of the ads in the back of this magazine, it is possible to put in four transistors or the price of a single tube. Not only that but you will find that there are almost no shocks involved in transistors which means a lot to us who have grown up the hard way with high voltage. Power supplies may be eliminated bv using batteries, thus assuring yourself...

Tat

Daniel Ln. St. Ann, Mo. 63074 ishing to get on six meter SSB and not having the cash necessary to purchase any of the few commercially available transmitters, decided to try my hand at designing and building some sort of hetrodyning unit to use with a HF SSB exciter, I located a real clean Central i lectronics 10B phasing type exciter, wound a set of 20 meter coils and went to work on this project T ie oscillator-buffer is more or less a standard overtone circuit...

Cy

Input 400 cps 3 phase 1 15 v. Output 5300 vdc at 450 ma and 6.3 vac at 2.7 a. Wt 20 Ib. 39.50 Spectrum Analyzer, X-Band PRO 854 with PRD 854 unit 8200 to 10 Kmc. 595.00 H, P. SHF Swept Frequency Oscillator 670 HM 7 to 10 Kmc. Exc cond. New 850, H. P* 717A Klystron Power Supply. Used with H. pT 670 HM (case slightly damaged.) 800 to 1000 v at 25 ma. New 375. 500 microhenry chokes Epoxy enclosed. Electroiyt ics. Duot 35 mfdr 450 v metal can TUBES RCA 7457...

Godley sails for England

Firmly resolved to hear signals or bust, Godley sailed for England November 15th aboard the Aquitania. Behind him, with reddened eves from long watches on the relay routes, American and Canadian hams touched up their rigs for the big assault just three weeks awav. Among Godley*s luggage nestled two receivers a regenerative set and a superheterodyne. Both receivers tuned from 150 to 500 meters. Especially built by him for the big job ahead, the superheterodyne the latest word in advanced...

K I W

One of the things missing on the Heath Sixer is a squelch. The Sixer regen really kicks up a fuss when there is no signal on the band, To make contacts in a location where there is little six-meter activity you should monitor the band continuously, but the regen hiss of the Sixer is hard to stand for very long, Here is a squelch for a sixer. It is not a true audio squelch but it is device to kill the regen when there is no signal. This means that strong impulse noises do come through but the...

Q Semiconductors

After a short break, here we are back again. One of the most interesting developments this month is in one of transistors' weak points. Manufacturers have had trouble with cross modulation in transistor receivers, especially low noise ones. 1 he solutions up to now have not been too satisfactory in some respects. A number of hi fi FM sets have used Nuvistors in the rf section to avoid overloading and crossmodu lation. Communications receivers ha e used attenuators in the antenna circuits. Now...

Kgoi

Improving the Twin City RTTY Converter After building the popular Twin City RTTY Converter described in a popular RTTY handbook and magazine the performance of the unit for weak UTTY signals left much to be desired. FinalK n 6SN7 was substituted in place of the 6C5 to establish more gain and limiting from the unit, he drawing shows the slight wiring changes including a decoupling network consisting of a 10K 1 watt resistor and a 40 mfd 450 volt electrolytic capacitor. Surprisingly enough the...

Semiknductrs

2- CLAIREX PHOTO ELECTRIC CELL, CLG07 , 2 500MC TRANS'TRS, 2N*964, mesas. tmn. TOI S 51 J 4 2N35 TRANSISTORS, npn, by S*lvaaia. T022 > 1 I 4 2N43 OUTPUT TRANSISTORS, by CK, pnp, T05 1 9 4 2N333 NPN SILICON transistors, by GE, T05 T 8, 2-6Amp SECTS, studs, silicon, 50 to -iOOV . 1 1 I 4-2N170 TRANSISTORS, -------- 1 3N99B TYPE, 1000 GAIN, mm silicon, planar , ,. 1 4 2N35 TRANSISTORS, tqin, by Sylvnn i. 7022 1 2 800 MC, 2N709 NPN Silicon planar TO 4 6 * * 1 3 2N711 300MW. 300 MC, PNP MESA, TOI...

B O CloJbL

IT IS A POWER HOUSE IT IS MAGNIFICENTLY LINEAR IT IS HONESTLY DESIGNED IT IS RUGGEDLY CONSTRUCTED IT IS MODESTLY PRICED CUAjutTwv C hJ< aoU aJavCt loi V a uW l f The 2-K Console or Desk Model 675 RF Unit Only 425 Please call or write for descriptive literature 6 FINANCE CHARGE 10 DOWN OR TRADE-IN DOWN NO FINANCE CHARGE IF PAID IN 90 DAYS GOOD RECONDITIONED APPARATUS. Nearly all makes and models. Big savings 15 day rial 90 day warranty. 90 doy full trade back on new apparatus. Write for...

Info

Mourice Lewton WA6PHR 3323 Via Del Cormel Santo Maria, California A remote signal beacon is very useful during alignment, antenna checks and other amateiu* testing. This simple low cost two meter beacon uses a cheap 8 mc crystal and very little else- It can be heard about half a mile away using 1 ma at 1.5 volts, or the input can he reduced for closer work. The entire unit can be built with one octal socket and a small terminal strip. The socket will hold the FT 243 crystal, the transistor can...

Hipar Products Co

Among numerous reasons for building this set, a major one is that I have always liked going up in frequency. When listening to the awful mess at times on the DC bands my faith and enjoyment in amateur radio Is upheld by thoughts of all that nice clean air on 432, 1296, and up I mean actually operating, contacts, mountain topping, etc,, including building and tuning up. When I wrote Getting Started On 420 back in 1946, I was running 80 watts to a 32 element beam in Rye, N,Y., and working three...

New Products

If youve been hemming and hawing about buying an SSB transceiver because the prices 011 the multiband rigs were a bit too high for you, it's time to act. Eico's new three band (80, 40, 20) gives you 200 watts PEP input for only 179.95 in kit form* It's easy to build with printed circuit boards. Among the features are 1 mv sensitivity, 2.7 kc selectivity, dual speed vernier tuning, receiver offset control, ALC, and many others. You can also get it wired for 299.95. More information is available...

Alltronics Howard Co

Box 19, Boston, Mass, 02101 Tel. 617-742-0048 Interested in construction and VHF This 8> i x 11 booklet wiff give you aff the information you need fo design and build perfect tanks the first time around. It contains 9 beautiful full page graphs to give you all the answers. You won't find this in any American radio handbook. 1 Then why not send for a free sample of the VHF'er Magazine. It's devoted entirely to serious VHF and UHF hamming. It contains articles by well-known and capable VHF'ers....

Sar Oc

Zeus has two new propane-fueled alternators available one of 3000 watts, the other, 1250. Propane offers a number of advantages over gasoline for alternator motors. It is cleaner, easier to store, more stable, causes fewer engine deposits, dot s not evaporate, and doesn't have gum deposits to settle. In addition, all of the excellent features of Zeus generators are included. Write to Tom Creighton, Zeus Portable Generator Co., 12345 Euclid Avenue. Cleveland, Ohio 44106 for more information...

Uc Xtal

1 lie grounded grid tripler to 432 mc and the groujided grid driver shown in Fig. 3 use surplus cavities from the ARC-12. fhese cavities. which use 2C39s, originally operated from 200 to 390 mc, but can operate on 432 with little work. The cavities are about 2 in. square by 5 in, long. Drive is to the cathodes. Output is from coupling loops in the plate circuits. First thing to do in modifying these units is to remove the variable capacitors which were mounted extern illy. Also remove the...

Top Ham Rigs Use Golden Guardian

, fAie best single side band filter available Using Golden Guardian, this Galaxy YTrans-ceivergives full frequency SSB CW coverage. Discriminating amateurs prefer McCoy Golden Guardian. Either upper or lower side band operation is selected by simply switching crystals. Here are the facts on Golden Guardian Impedance 640 ohms in and out unbalanced to ground . Unwanted Side Band Rejection greater than 55 db. Passband Ripple 0,5 db. Shape Factor 6 to 20 db, 1.15 to 1 Shape Factor 6 to 50 db, 1.44...

CW

The BCG memorial located 200 feet east of the original station site at Greenwich, Conn, It reads Near this spot on December 11, 1921, radio station IBCG sent to Ardrossan, Scotland, the first message ever to span the Atlantic on short v aves. IBCG, an amateur station, was built and operated by members of the Radio Club of America ' Courtesy of the Radio Club of A. The amateur stations heard by Paul F Godley and confirmed by D. E. Pearson the official observer during the December 1921...

Pipe With Coax Inside

Some time ago I was forced to QRT because my landlord wouldn't let me install a beam or a half wave dipole on the roof- In desperation I came across the coaxial, or hypodermic, antenna. Many hams aren't too well acqusunted with it. but it is basically nothing more than a vertical dipole. It is an excellent antenna for DX because it has a very low angle of radiation and also radiates equally well in all directions, 1 immediately decided to figure out the dimensions for a coaxial antenna for...

All solidstate switching builtin sidetone integral paddle

NO RELAYS TO CHATTER PUNCH HOLES JN CHARACTERS . . . the solidstate switching circuitry of the Heathkit HD-10 Electronic Keyer articulates crisp, clean CW characters. Speed, dot space ratio, and sidetone volume are adjustable. Each dash is three dot spaces in duration, each character of a series is separated by equal dot spaces. The built-in sidetone lets you practice off the air, lets you hear your keying as you transmit on the air. The HD-10 helps you develop a near-perfect fist. COMBINATION...

Waters Wide Range Attenuator

Provides 61 db of attenuation in 1 db steps. Used effectively in S-Meter calibration checking receiver sideband suppression measuring crosstalk in switches, receiver image and IF signal rejection, relative antenna gains, etc. Maximum power A watt, dc 225mc, 371-1 has S0239 and 6 meters to YOUR super-het receiver connectors 371-2 has BNC connectors. meter-tuning superhet receiver into an HF VHF Receiver and with no modifications to the receiver No switches or relays are required, and AVC from...

Lakeshore Bandhopper

NATIONAL HRO-500 amp Matching Speaker like new NATIONAL NCL-2000 demonstrator Linear NATIONAL NC-98 Receiver and Speaker NATIONAL NC-173 Receiver and Speaker RME DB-23 Pre selector REDLINE 432 MC Deluxe Conv. amp Supply 50-54 MC IF new SWAN 240 Transceiver with both supplies SWAN 350 amp AC Supply Demonstrator 49.00 49.00 119.00 24.00 39.00 99.00 375.00 665,00 139.00 229.00 495.00 449.00 750.00 69.00 49,00 29.00 39.00 19.00 249.00 99.00 129.00 189.00 5-00 15.00 349.00 29.00 139.00 109,00 99,00...

Fone

Pay cash and save. Write for details. Joe Dimare, Box 20672, Dallas, Texas 75220. 1W-22 SSB Transceiver, Hp 23 power supply, GH-12 microphone, xtal calibrator, 125, PE-1G2-B gas-engine-generator, tool kit, manual, spare parts, 50. K1FSS, 121 Marble St., Athol, Mass. WANTED All types Military, Commercial, Airborne, Ground, Electronic items . . . Testsets, GRC, PRC, Collins, Bendix, others. We pay freight . . - RITCO, POB 156, Annandale, Virginia, WANTED Motorola HB...

Or Thru Youp Favorite Distributor

Science, physics, history etc, in your school years in order to attain a passing grade. It may take a small child two or three years to begin to recognize and understand the simple phrases tossed his way by adults All, ah . . . mustn't do that . , . Baby, stop that, No, no . . etc. Likewise, before he can pronounce simple words in a decipherable form such as, Daddy . . , Mommy . , . Kitty . , , etc., he goes through many months of learning this simple oral vocabulary. As a Technician licensee,...

Novel ALC Circuit

This simple method of ALC is very easy to add to most transceivers. It increases talk power without introducing splatter, as Jim Kyle pointed out in the article in the January 73. I strongly recommend that you read this article if you want to understand what happens in a transmitter when you use ALC. Basically what is needed is some means of obtaining sampling information that tells when the final amplifier is about to be overdriven into the non-linear region of power output where flat-topping,...

Davco

Tollahossee, Fla. 32302 Phone 904-224-4322 Bill Smith KPCER 1301 Churchill Sioux Foils, S.D Since the initation of the VHF column in this magazine I have received a number of letters from new licensees, and some that were not so new, asking for information on how to get started on VHF. After looking through several years of the amateur publications it is obvious why these letters were received, 'he newcomer to VHF lias been virtually ignored in the maze of pump...

Motor Hotel

Denson Electronics

10 minutes from owntown Lot Angeles ,, .within easy occetf of oil the area's fabulous attraction . .near Holly wood Famed movie and TV stufftof Wide choice f accommodations,, .room, suites, Kitchenette - 011 rooms ure air and sound conditioned, have Hi FJf TV, switchboard wvice and room phones King-size swimming pool t.patio for Sunning ond relaxing. Member of Diner's Club, American Express on lt J Carte Blanch Telephone HOI lywaod 3 - 5671 777 Vint Street HOLLY WOOD 3B,CALIFORNIA it. F, TOROID...

Works Gwp On Metres

INDOORS ZUGA's JOYSTICK got him 569 on 3,5 mes from G5WP on 21st February, 1965 at 0850 GMT. Alan had worked VE7BIY on 3 5 mes ot 559 and also logged 59 countries on 14 m es by that date, including LU1HBS and 9M4LP. montais continu to pour in. Partridge operate a rigid, 100 Money Back Guarantee if you're not completely satisfied This ticket will bring you the new brochures by return of post Please send brochures ond testimonials. i O f -I m m - r - - - .J-.-- - - Ji m - __- . a. j. i. _ - m- m....

Now Taki Advantage Of This Special Price

SEND YOUR ORDERS TO ALCQ LAWRENCE, MASS. Well, here it is catalog time again- If you don't already have Allied's huge 50S page 1966 catalog, send for it today. Its a necessity, You can drool and drool over page after page of new amateur equipment, old ham equipment, industrial and service supplies, hi-fi equipment, Knight kits, books, tools, and everything else a ham needs. Request your copy now from Dept. 7311, Allied Radio Corp., 100 Western Avenue, Chicago, Illinois 60680, Newark's 1966...

Vidicon Camera Starter

SIX different kits to choose from. ,select the one best suited to your needs, PERFECT FOR HAM TV, CCTV, ETV, SCIENCE FAIR PROJECTS Team up any of these kits with parts from your iunkbox and before you know it you'll be televising live pictures on your own TV set, It's EASY-FUN-EDUCATIONAL Basically here's how it works We furnish you with a wide choice of hard-to-find components in a variety of kit forms complete with a set of easy-to-follow instructions for building what we feel to be the...