Preamplifier

For 27 (CB), 28, 50, 144 or 220 MC. (Also available for 150-170 MCS) Add this Ameeo Nuvistor Preamplifier to your receiver (or converter) to improve the sensitivity and noise figure. Two tuned circuits also improve rejection of image and spurious frequencies. Compact, easily connected and low power requirements, wired and tested with tube. Ideal for improving performance of surplus FM Two-Way equipment for NET operation on the 2 and 6 meter bands. Write for details on 150-170 mes and others...

Saroc Seventh Anniversary

Advance Registration S9.00 per person entitles registrant to SAROC Special room rate S12.00 per night plus room tax. single or double occupancy, effective January 4 through 12. 1972 tickets for admission to technical seminars, HAM RADIO MAGAZINE and SAROC Happy Hour Thursday, SWAN ELECTRONICS and SAROC Social Hour Friday. HY-GAIN GALAXY ELECTRONICS and SAROC Champagne Party Saturday, Buffet Hun I Breakfast. Sunday. Ladies who register will receive transportation for shopping...

Only Telrex Gives You All These Features

Power rating 4 KW PEP . . . rain or shine Wind rating survival 110 MPH Patented broad-band coaxial Balun Heavy-duty steel gusset mounting plate Aluminum boom 2 in., 2Vz in, O.D. x 18 ft. Large diameter, .058 wall taper-swaged dural elements for minimum weight and exceptional strength to weight ratio Stainless steel electrical hardware With a Telrex Tri-band Array you get 49 lbs. of educated aluminum engineered and built to provide many, many years of performance unmatched around the world by...

Park Electronic Products

Salem, N.H. 03073 603 893-0276 Subvert the Whole Family With Another New73 Book Accompanied by the applause of millions, the Amateur Radio Novice Class License Study Guide is out. Not previously published in the pages of 73, this brand new book really covers all the subjects relating not just to passing the FCC Novice exam, but to really learning all the necessary things for getting on the air. Ham slang, FCC regulationese, simple formulas, and Novice theory are all explained...

Th National Convention

JANUARY B TO 9 * 1972 FLAMINGO CONVENTION CENTER LAS VEGAS, NEVADA 5AR0C, Flamingo Hotel Room rate 12.00 plus tax, single or double occupancy. Mail to Flamingo Hotel. Las Vegas. SAHOC, advance registration 14.50 per person, regular registration at the door, Flamingo Hotel Late Show, Sunday Breakfast, Cocktail Parties, Seminars and Meetings, Mail to SAR0C. SAR0C, sponsored by Southern Nevada ARC Inc., Box 73, Boulder City, Nevada 89005. SAR0C, sponsored by Southern Nevada ARC Inc., Box 73,...

Tuning Slide

Twinlead has losses of from 1.0 dB per 100 ft to 1.5 dB per 100 ft at 150 MHz in dry weather and from 1.0 dB per 100 ft to approximately 10.0 dB per 100 ft in wet weather. The minimum effects of wet weather are found in the jacketed (not shielded) twinlead such as Belden 8285 and in tubular twin lead such as Belden 8275. The worst losses occur when common flat twinlead is used. Best all-weather 300f2 conditions are met with 300 2 open line. Losses range from about 0.5 dB per 100 ft at 150 MHz...

Amateur Electronic Supply

Milwaukee, Wis. 53216 Phone (414) 442-4200 HOURS Mori 8. Fri 9-9 Tues, Wed fe Thurs 9-5 30, Sat 9-3 To AMATEUR ELECTRONIC SUPPLY 4828 West Fond du Lac Avenue Milwaukee, Wisconsin 53216 I am interested in the following new equipment 1 have the following to trade (what's your deal ) Ship me the following New Equipment. COD (20 deposit) Revolving Charge Plan Send Reconditioned Equipment Bulletin

Silicon Stud Rectifier

GIANT SALE ON NEW TTL TEXAS amp NATIONAL ICs 5N7400N fluad 2 input NAND gate S -4S SN7401N 5N7400 with open collect 45 SN7402N Quad 2 input NOR gate 45 SN7404N e Inverter .45 C SN74D5N Hex inverter, open collect . . .45 5N7410N Triple 3 input NAND gate 45 SN7420N Dual 4 input NAND gate 45 _J SN743DN 8 input NAND gate 45 SN7440N Dual 4 input NAND buffer 45 SN7441N BCD - to-Decimal driver 1.50 SN744SN BCD-to-7 eg. dec. driver 2.25 C SN7447N BCD-to-7 seg. dec. driver 2.35 C SN7472N J-K Master...

Ry

SW3 Ceramic 3 position single pole The rest of the power supply is for bias and plate and screen voltage. The bias transformer is a filament transformer with its 6.3V winding connected to the 6V filament supply. This produces around I10V on the other winding which is rectified by a half-wave rectifier and then regulated by a VR-75 gas regulator tube. This then goes to a variable voltage divider which supplies the bias to the 4CX250 grid. The transformer used for the plate can be obtained from...

Erickson Communications N

Ravenswood, Chicago, III. 60640 334-3200 ELECTRONIC EXCHANGE CO., INC, 608 Papworth Ave-, Suite B, Metairie, La. 70005, 834-9000 FRECK RADIO amp SUPPLY 38 Biltmore Ave., HARRISON Rt. 110 at Smith, Farmingdale. N.Y. 11735 293-7990 8 Barclay St., N.Y. City 227-7922 HAM RADIO CENTER 8342 Olive Blvd., St. Louis, INDUSTRIAL DISTRIBUTORS 1209 S. Industrial JRS DISTRIBUTORS 646 W. Market St-, York, KASS ELECTRONICS 2502 Township Line Rd MADISON ELECTRONICS 1508 McKinney Ave., PORTLAND RADIO SUPPLY...

Devices

HOT CARRIER DIODES HP2B01 S .90,12 S10.00 Matched by HAL 4 lt 1,25 mm TAL les r.L'ji.i 1 ,'ju m ih S3.3d mwp. MFTI r IC id'. S1.3 M-.F80' S3.il MJtJJ' Mr. .p Mf7 r, VIC.' '. MC 121- 'AC 11' ' Sl. i M MCF760'. 7400, 7401, 7402, 7410. 7420, 7430. 7440 , 7404. 7405 .S BO 7441. 7495,7436 S3,00 7472 S .75 7486 53 ,15 7490,7492.7493 S2.1D CINCH IC SOCKETS B-ICS, 14-DIP S .60

Vertcal Antenna for Meter Fm

Zook K9STH 818 Brentwood Lane Richardson TX 75080 Most amateur FM activity in the United States is vertically polarized to facilitate easy contact with mobile stations. Thus, amateur base stations have tended to utilize whatever type of vertical antennas available. Generally, these antennas consist of groundplanes, obsolete commercial gain antennas, and modified mobile antennas. These antennas are quite satisfactory in many applications however, when more signal is needed in an...

Interprises

El Segundo, Ca 90245 772-B176, which may set up oscillation within the linear. No amount of neutralization will cure this problem. The plate tank circuit is a pi-network type. The plate loading capacitor is capable of being shunted by several values of fixed capacitance. This gives quite a range in which to find the correct loading. The tuning and loading capacitors are mounted piggyback fashion in the final compartment. The tank is wound with 12-gage silver-plated wire. I tried...

Handmike

Rugged, heiivy-duly carbon handmike with press-to-talk switch. Equipped with 4-fl cord amp phone plug. SPECIAL J, iT NEW, boxed . . . . Each 1.88 2 lor 3-25 ARC-5 T-23 TRANSMITTER I00-15R Mr mcluding lubes - 32A. 2-1 25, prvslal Used, less culii-i . . 5. gt n ARC-5 R-2B RECEIVER '2-Mfh-r SupiTliel, 1110-1 r l Mc in I crystal channels, et mpj f Willi 10 tubus, Km- Used 21.50 ARC-5 MD-7 MODULATOR t r ARC-5 transmitters. with lubes. Kxc. Used S12 50 Mounts ill 2-1 8 hole. Flange diameter 2-5 8....

Dxmailbag

W9IGW and myself W2BBK plan to arrive at St. Maarten. We will be operating for a couple of days from the French side of the island as FG0GD FS7. Thereafter we will go to Anguilla for a few days, operating as VP2EF Wayne and VP2ES myself , in company with PJ7VL Vmce LaBega . After the Anguilla stint. I will be returning to Dutch St. Maarten for a few days to operate as PJSAA. We plan to cover all bands that are open from 10 through SO, both phone and CW. We...

Janel Ca Converter

After searching around for the ultimate 432 converter for the past three years and using the leading 432 transistor converters, I decided that my own home brew style nuvistor converter with a transistorized preamp was indisputably the best. To make a long story short, I soon discovered that my home brew converter wasn't the best and my egotistical nature decreased to minus 80 dB. The Janel converter did an excellent job with plenty of gain and low noise level, which gives it a big plus for the...

Super Buys

IVIC1550 Motorola RF amp 1 80 CA3020A RCA 1 audio 3.92 MC1306P Motorola Vi W Audio 1.10 MC1350P High gain RF amp I F amp 115 MC1357P FIVt IF amp Quadrature det . 2.25 MC1496 Hard to find Ba . Mod 3.25 MFC 9020 Motorola 2-Watt audio 2.50 MFC 4010 Multi-purpose wide-band amp 1.25 MFC 8040 Low noise preamp 1.50 MC1303P Dual Stereo preamp 2.75 MC1304P FM multiplexer stereo demod 4.95 TRANSISTORS MPF105 2N5459 JFET 96 MPF107 2N5486 JFET VHF UHF 1.26 MPF121 Low-cost dual gate VHF RF . . . .85 M F...

Tempo Ct Tr

At the receiver location two-site repeater , a cathode follower feeds the receiver audio into a transformer continuously, but the receiver squelch fceeps audio off the line until a carrier appears. The B leg of the two-wire line is held at ground potential by the normally closed COR. When a carrier appears, the ground is moved to the return leg and B is allowed to flow with the audio through the wire pair. The capacitor on the transformer secondary isolates the dc polarities vsithout...

Capacitors

65,000 MFD 5V 30,000 MED 1 OV 25,000 MFD 25V 20,000 MFD 30V 8,000 MFD 55V 20,000 MFD 25V 35,000 MFD 15V 40 000 MFD 10V Price 3 1.00 or 10 S3.00 1206S. NAPA ST., PHILADELPHIA, PA. 19146 PHOIME 215 HO-8-7891 215 HO-8-4645 All prices are F.O.B. Our warehouse, Philadelphia, Pa. All merchandise described accurately to the best of our knowledge, Your purchase money refunded if not satisfied. Terms are cash. Minimum order is 5.00. All merchandise subject to prior sale. _

Tempo Ct Hipower Amplifiers

Tempo also offeis a full line of 2 meter FM amplifiers for mobile or base station operation. Output ranges from 45 to 100 watts tot drive power of 1, 5, or 10 watts. Tempo CT1002 10 100 VHF Amplifier 220. Tempo CT602 10 60 VHF Amplifier 145. Tempo CT252A 1 25 VHF Amplifier B5. Plus six other amplifiers The Tempo CT220 TR FM AM transceiver is a truly unique, top quality little giant offering features never before offered in any unit at this price. Only 179.00 The Tempo fma is the top of the...

Info

Over 2,000 satisfied users have never paid a cent for a repair in fact, part of our . . .If you ever have a problem with your booster take it to any DYCOMM dealer and he will replace it free of charge, if it is ou t of warran ty he will give you another booster and we will charge for repairs, if it seems appropriate. . 500C FM Booster, 4-12W in, 15-30W out 10W input output 25W S 59.95 500D Slock Booster, 8-12W in, 35 55W output, 16W of drive is F8, this outstanding bargain is still only 89.95...

Letters

Quency output 26 30. 28-32, 50 54 MHz Gain front panel adjustable 0 to 35 dB Noise figure 4.3-5.5 maximum dB I-f rejection at 28 MHz i-f 75 dB ImagtLrejection at 28 MHz i-f 40 lt IB Maximum input signal level 10 mW Power supply 117V ac or 12V dc lt g gt . 40 mA Price class 65.00. The manufacturer also has plans for producing an antenna mounted 432 MHz preamplifier with built-in antenna relay and power supply. The JaneJ model 432CA converter and further information are available direct from...

Vesto Towers

Write Or Call Toiaj For Complete Free Vesto self-supporting steel towers have been the choice of project engineers and advanced hams for years Renown world-wide for quality and economy. Vesto towers are shipped in compact bundles ready for easy erection using unskilled labor and basic tools. Hurricane-Proof 4 post construction of hot dip galvanized steel lasts a lifetime

Namservice Goes

Out hi the Pacific Northwest the new NAMServiee Northwest Amateur Monitoring Service on 3970 kHz has in less than two months operation - firmly established itself and already has demonstrated its emergency-rescue value. In one of these K7EHN was up in rugged mountain area out of Vancouver, Washington, on a fishing trip. Backing his trailer to park it, one of the brake cylinders of his 1967 4-wheel drive International pick-up gave out. All four wheel brakes were then inoperative he was grounded...

Blast Rocks

On Sunday evening, July 25, 1571. fear suddenly became a major part of the emotions of a large sector of Birmingham area people. What had been a warm, quiet and peaceful time became alive with fear as an enormous blast shook houses over some 20 square miles or more. People ran from their homes and businesses to try to see what had happened. Moments laier a second and much more powerful explosion took place, sending glass, fragments from windows across rooms over a wide area, with enough force...

Oscar Flyby Successful

Test flight AA2, the second airborne test of the type of equipment to be orbited on AMSAT-OSCAR-B AO-B early in 1972, was successfully conducted on September 25, 1971. Taking off from Van Nuys airport, northwest of Los Angeles, at 0900 PDT, the aircraft covered about 1,100 miles, flying over California's most populous areas, including about 50,000 licensed amateurs within llne-of-sight of the plane. Proceeding south to the San Diego area at an altitude of 11,500 ft, it returned past Los Angeles...