Take it

We began the manufacturing of ham gear not too many years ago on the simple premise that there was considerable room for improvement, particularly in the accessory field, it was our contention then as now, that up-dated equipment engineered right, built right and priced right would find a waiting market with the amateur. It did and it does From the very start we set our sights high, picking up where others had bogged down in the dogma of it can't be done. Truthfully, improving on the products...

Communication Components Company

Box 8721 Dept D Orlando, Florida 32806 PRICE BREAKTHROUGH ON BEAMS FULL SIZE complete with buom and hardware S H 1 1 handles 5 KW arfjusLibte entire band ud 1 alloy tubing coaxial fee< l 3 El 20 22*00 3 Et 15 16.00 2 El 20 16.00 2 Ef 15 12.00 4 El 10 . , . 18,00 4 El 6 15,00 ALL SAND VERTICAL VlflO ifi thru 1*0) 18-95 QUADS NEW NKWl ALL METAL (except iiisulaiiira) Cubifiil Quads 2 El full size complete with boom, all hardware terrific in and directivity best ijuaf ever made no bamboo 20...

Pad

Notes on the assumptions The assumption that the capacitor supplies full power to the final is only going to apply for an almost square envelope output, a case you would only get with either CM or clipping of the sort used b> the Clegg VHF gear. For undipped SSB, a sine wave assumption might be better, in which case only half as much capacitance would be necessary. For full wave rectification only half of that will be required. The assumption of an allowable 1 db drop in power was taken...

Send For Rohn Tower Handbook

ONLY 100 postpaid t'special to readers of this magazine K Nearest source of supply sent un request. Representatives world wide to ser 'e you. Write today to Tlie article How to Be a First Class Lid on Phone without Really Trying in issue apparently stepped on mam lues. We apologize to all the lids we offended. People (mostly hams) write us all the time with questions. Most are fairly straightforward, and if we had a siail of five EE's with nothing else to do, we'd he happy to answer them....

Prod

Al Demon has just brought out a fat, 96 page twentieth anniversary catalog lull of , ATV, test equipment, ham gear, surplus, TV camera kits, etc., etc. You'll spend hours looking at this catalog, drooling over the contents every minute. It's also got lots of schematics, conversions, informal ion about equipment and other interesting data. If you're a builder, youve got to get this one. Write to Al Denson, Rockville, Conn., and ask for catalog 965-S1, If you haven't gotten Lafayette's new Spring...

Auoo

Fig. 3, Field effect tetrode product detector. Fig. 3, Field effect tetrode product detector. type. Fig- 2 A shows I lie essential part of the triode-tube detector and Kig- 2B shows its transistor counterpart.4 Since the BFO drives the emitter, we again must deliver rather a large power level from the BFO into a low impedance to make the detector work. In fact, it is the rectified BFO voltage that biases this product-detector. When the BFO is turned off, he operating point changes considerably,...

Info

MICHIGAN AVENUE CHICAGO, ILLINOIS 60616 But we have enough cosh to pay you the most est for a If your late model equipment We want to buy ground and air communication equip., teletype GRC PRC, ARC, ARN, amp tebt equipment. WE PAY FREIGHT Tell us what you have . . . what you want . , . and we'll give iou the best deal in the country ODAY 4365 W Pico Blvd. Los Angeles, Calif, 90019 Then why not send for a free sample of the VHF'er Magazine. It's devoted entirely to serious VHF and UHF...

Own A Ameco Tx Transmitter

753 Tri-Barrd Transceiver 179.95 5299.95 TX-62 2 and 6 Meter Transmitter SI49.95 VFQ-62 I Matching VFO for TX-62 59.95 Complete AMECO line available from AMATEUR ELECTRONIC SUPPLY GOT A TRADE . . . Use handy coupon below to get our deal , . . no obligation. USE OR ENCLOSE THiS COUPON WITH ANY ORDER AND WE'LL SHIP. 4828 West Fond du Lac Avenue Milwaukee, Wisconsin 53216 I am interested in the following new equipment 7 1 have the following to trade what's your deal Ship me PREPAID your expense...

Space Electronics Co

BRONX, NEW YORK 10457, 212 CY 9-0300 circuit is similar to one used in one of the newer amateur-band-only HF receivers, but an additional L-C filter 5 mh and 510 pf was added to cut down 455 kc in the output, and dc was used for tlie heater. These additions were to prevent llie audio output VTVM from reading i55 kc or 60 cps, to either of which frequency it was sensitive. The 6BE6 product-detector circuit is shown in Fig, 4 and the response curve is also shown in Fig. 5, As can be seen, the...

Alvaradio Industries

SANTA MONICA, CALIF. 90405 Phone 21 3-870-021 6 Ask for Harry W6ATC LM FREQ, METERS, the Navy's BC-221, more compa-ct, crystal calibrated, good condition, no book 34.50 ARC-21 JF amp Audio strip, 16 lubes, 2 mech, filters, squeEch, ANL, BFO, AGC, AVC, conversion instructions and ideas to moke into AM or SSB fixed freq, receiver 12.50 Send stamped, addressed envelope for list Sox 393 Littleton Denver , Colorado 80120 Curl up this winter with 20 assorted fascinating back issues of...

C

Typical variation in shift with diode circuit. this isn't the ease in your VFO, you can tap the VFO coil a few turns from the ground encl Y ioii the keyboard is opened, the diodes eon-duct partially due to the forward diode current which flows. This causes a portion of the capacity C to appear in the VFO circuit, lowering the oscillator frequency for the space signal. The 47k resistor and ,005 uf capacitor act as the key-click filter since the RC charge time causes a gradual frequency...

Wnpd

Covers aM Ham Bands 160 thru 10 meters. Covers MARS and Other Frequencies between ham Upper and Lower Sideband on all frequencies Automate Transmit Receive Switching on CW fsemi Controlled Carrier Modulation for AM Is completely compatible with SSB linear amplifiers Two Crystal Lattice Filters for sideband Selection, Transmitting AGC prevents flat topping. Shaped Grid Block Keying with side tone output, 200 Watts PEP Input on SSB 180 watts input CW. Meter indicates plate current and relative...

Fone

The Hammarlund HQ-170A offers the Amateur a practically endless combination of tuning techniques whereby optimum reception of S5B CW amp AM MCW moy be achieved. Selectable Sideband, Full dial tovercigo 6 thru 160 meters, plus 2 meter calibration. Built-in 100 kc Crystal Calibrator Automatic Noise Limiter, and many other features. HQ-170AC with 24 hour clock timer 5379.00 Aho in slock i HQ-170A -VHF 42900 HQ 170AC-VHF with 24 hour clock 'timer 439.00 VHF Series From 2 to 160 meters It only takes...

After

A permanent cure for the NC-300 fifoment regulator's troubles. Solution to the Crossword Puzzle on page 98 SILICON BISWITCH 7 amp 200 piv, used in AC phase control and lamp dimmers. Circuit for 750 watt lamp dimmer included. 2 for 1 SILICON NPN MICROTRANS1STOR, silicon planar eprtaxial. V. to 40 volts, Vreo 15 volts. 150 mw, 100 mc with specification sheet. 2 for 1 SILICON BI-DIRECTIONAL TRANSISTOR, PNP SILICON MESA POWER TRANSISTOR, 85 watts, Experimenter's package. Your choice of any...

Wusatv

Two-way television, with voice, was accomplished at the New York World's Fair in 1940, lor the first time in history It is very interesting to note that this remarkable achievement was die work of radio amateurs. While the storv of W2USA the six-station amateur set-up at the World's Fair, 1939 is Old 11 at4 to many old timers, there are now thousands who never heard of it and a brief review is indicated. One of the most active amateur radio groups in the metropolitan New York area was the...

Receivers

W lOOkc cal Hammarlund HQ110C Hammarlund HQ145 Hammarlund HQ170C Hammarlund HQ180 Heath HR-20 Morrow Fatcon Rec Morrow 58R-1 Convert National NC98 National NC109 National HRO-5QT National NC125 National NC173 National NC183D National NC270 National NC3Q0 National NC303 RME 4350A

Parametric Amplifiers

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 build your own for the various UHF bands, and how to tune them up. Parametrics have helped UHF move Into the space age, but don't forget that the first working parametric amplifier was built by W1FZJ and worked on six meters. Order this book direct, 2.00 postpaid, or from your local parts distributor. from The home of the originals Number 2 of a...

Nqtf

Tis34 Datasheet

VAHA amp _E CAPAOTOJtS IV3ICA7E TUNE Cr OjiTS Fig, 1. Grounded source RF amplifier Fig, 1. Grounded source RF amplifier neutralizing indocto mere ill gam. decrease stability TZ SHOULD HAVE HIGHER Jbsi THAI Ti step-up , limited of coarse by gain requirements. The cascode circuit is more stable, since the grounded source first stage is driving the low impedance grounded gate second stage. It has the obvious disadvantage of using two of these expensive devices. Probably the best RF amplifier...

Vhf Nuvistor Printed Circuit Converters

A very compact .a higti gain fori- vprter 4 6CW4's. Ca eode RF amp, oscillator triple and mixer. 6.3 v and 50-90 t. S N 3 5 db. Size 2 x 4 x 6 or 2 meter Any ii 8.50 pp CASCODE NUVISTOR LOW NOISE PRE-AMP. x 2. 27 30 mc. W mc, 144 mc lt 20 40 dh. gain. Uses 2 6CW4's. Low frequency rommercial on request 5.00 pp LITTLE GEM 6 METER EXCITER AND TRANSMITTER RF SECTION, f gt watts in, 3 waits out. ITses 1 6AU8 and S mc crystals. 2 x This is tun to play with' WA4NED S7.50 pp All toned...

Telrex Laboratories

Featuring the SB-100 amp HA-14 Full kilowatt P.E,P, SS8 five band transceiver 80-10 meters Fixed or mobile operation with appropriate power supplies listed below Built-in antenna change-over relays Built-in SWR meter Operates PTT amp VOX-Upper Lower sideband Built-in 100 kc crystal calibrator Transceiver tuning with Heath LMO - 1 kc dial calibration Here's A SSB Combo That Has It All Over The Competition In Power, Performance, And Versatility . Go barefoot with the SB-100 for 180 waits upper...

Eik

Ssb Ringdemodulator

IoAR HQ needs the updated, correct address of the following Davis, RAW KB6CS Livingstone, A.W. K6VYJ MacArthur, Roger K9UYA Miller, Chase. W. Jr W4AXV Nelson, Robt. L. K6ZCQ The response to HQ's appeal for news clippings concerning amateur radio has been excellent Here is a project in which everyone can help Watch gt our newspapers and magazines for any references to amateur radio, cut out the clips and send them to HQ. Please help fill HQ's Scrapbook With the ratification of the C and BL...

Grove Electronic Supply Company

Telrex Roto Indicator

Chicago, III. 60641 QRZ RME 4350-A gt w spk. 11 LM. Knight T130-A 65,00, Both very clean. Twoer, one year old 45.00. WB6FME, Chuck Evans, 2014 Enslen Ave., Modesto, California. RCA VIDICON 7735A, 15,00h Heath test equipment. 432 KW Telrex 2 Meter system. 2 meter transmitter, 6 meter converter, 432 grid dip meter. Radar sentry, UHF converter, 2 meter linear, 432 converter and preamp. 2 meter halo Andrew's HO TV Heliax-Coax, CDR rotor. Tube tester, HO-13 plus more, write for...

With

ThiPi You've been hearing about it maybe JLJUlO UJlClbOOlM lt U gt lt U gt you've worked Carl Mosley W0FQY- 'The Old Man Himself' using it. Now here it is , A Revolutionary New 3-element beam featuring an advanced Mosley-engineered matching system called 'Broad Band Capacitive Matching' with coax fed balanced element for more efficient beam performance and extra gain over compara tive 3-element beams. A New 'ri-Band beam rated for 1 KW AM CW amp 2 KW P.E.P. input to the final amplifier SSB on...

Of Military Electronics Unopened Carton Amateur Equipment Listed Below

We'll give you any piece of equipment that you name HAMMARLUND, COLLINS, HEATH, NATIONAL, GONSET, ETC., ETC. at our low trade cost in exchange for any piece of surplus equipment valued at our higherthanrnarket evaluation. NAVY TED TRANSMITTERS, AN SPN-5, 7, 11, 18 RADAR Raytheon 1400. 1, 2. 1500 Pathfinder Radar AN URA-8B. AN SPA-4T 8, 9. AN GRC 3. 4, 5, 6, 7, 8. 9. 10. 19. 26, 46. RT 66. 67, 68. 70. AM-65 GR. T 368C URT. PP-109 GR. PP-112 GR, RT-174 PRC 8- R-108 GR, RT-175 PRC 9. R-109 GR. RT...

Magazine

In your January issue you mentioned the UFO enigma. That's been a pet interest of mine for years. In November of 53, the first year the 15 meter band was opened up for phone operation, I conductcd the first known UFO seminar on the ham bands on this subject We met every day at noon California time. There were several regulars who called in daily, some of whom are now among silent keys. These included W6ZZ i deceased gt WfiBD deceased W61JU, W60ZC i deceased several other W6 s. and many persons...

Vhfi

Hond calibrated from crystal oscillators by K 1CLL. Now you can find the 432 mc and 1 296 mc bands. Know the frequency of your doublers, triplers and oscillators. Dan t guess UHF-1 350- 675 mc UHF-2 600-1100 mc UHF-3 950 1400 mc Mahogany Carrying Case For Five Wavemeters 22.50 In stock.. Send check or money order for 48 hour shipment, Far Over Farm, 603-924-3030, Peterborough, N, iH. R1 OA ARC 1 2 Later Command Receiver, 550 and 1500 KC New ....................... 34.95 R13A ARC12 108 and 135...

News From The Institute Of Amateur

David Middelton W7ZCf Secretary IoAR constitution approved by Members A Report was mailed to all Members of record in i arly February. Due to a delay in production of the Report at 73, the deadline of February lOtli for the return of ballots on the Constitution and By Laws came shortly after mailing from Peterborough. A post card extension notice to all Members the first week in February established the new date of March 10th for receipt of ballots at IoAR HQ. Here are the...