Comdel

New The Most Modern Rsdio Spectrum Monitor Ever Offered Heathkit SB-620 Scanalyzer. . . . Only 119.95 New narrow fixed sweep function with crystal filter for single signal analysis 10 kHz, 50 kHz, and variable control to 500 kHz Increased sweep width capability for monitoring larger band segments up to 500 kHz for IP's above 455 kHzr end up to 100 kHz for 455 kHz IP's Matches SB-Series in style and performance * Operates with common receiver IF's up to 6 MHz Both kHz preset sweep width indicate...

The Davco Dr Communications Receiver In Brief

FREQUENCY COVERAGE Ten 550 kHz segments covering the entire 80, 40, 20, )5, 10 meter horn bands plus 50.0-50.55 in 6 meters and 9.5-10,05 WWV, Provision for two extra ranges. 100 kHz crystal calibrator, SENSITIVITY Better than .6 microvolts for lOdb s n, SELECTIVITY SSB 2.1 kHz Collins mechanical filter. AM 5 kHz ceramic transformer filter. CW 200 Hi crystal filter STABILITY Negligible warm-up less than 100 Hz per hour less than 25 Hz for 20 power supply variation. Extreme resistance to shock...

Oz

VISIT OUR BARGAIN 'RETAIL' STORE 211 ALBION ST., WAKEFIELD. MASS. 5 WATT EP0XY POWER TRANSISTORS TERMS ifiid thfck, mon j Incl'.fiJfl TnM ijrr avff. t per r k t ib, n.itrij. tiei 30 dryi COD* as rv P,0, SOX 94 A SO. IYNNF1EID, MASS. 01 94 0 PAK-KIN O of Hi* World Alan Ross VE3FKY i 3 Catherine Sire ei Dorchester, Ontario, Canad When J first moved to ihe small village of Dorchester two years ago, there was only one other active ham now we have five and some others who are working towards their...

Arrangement

Write for the GBC's catalog an encyclo pedia of equipment in the CCTV field. . . Just look On the left you see GBC's revolutionary breakthrough the VF-301 closed circuit television camera. Now, economy priced at less than 560 Distributor Cost. On this viewfinder camera you can see the picture exactly as it will be transmitted to your monitor or as your video tape recorder will play it back. You don't have to build a makeshift contraption such as you see above . . . a television set piggybacked...

Codax Keyer

Automatic spacing and timing from 5 to 50 WPM . , . built-in double-paddle key adjusts to any fist Solid state with sealed ''Reed relay ,, , keyed audio output at microphone level allows use of VOX circuit on either sideband. Self-powered operates with any The ultimate in phone patches providing effortless, positive VOX operation. Also connects tape recorder for both IN and OUT. Available with or without built-in Compreamp which may be used independent of patch, MODEL 3001 (Without Compreamp)...

Mighty Four on

A fow costT four transistor transmitter for six meters. Here is a transistorized transmitter for six meters which is small in size (21SV by 2), complete with modulator, but still capable of putting out a very respectable signal. The modulator uses no transformers, and has a small W speaker as the microphone. Only four low-cost transistors are isedT and actual on-the-air reports indicate excellent performance. I lie transistors specified are slightly unconventional, in that the Motorola MPS6516,...

Quement Electronics

1000 SOUTH BASCOM AVENUE SAN JOSE, CALIFORNIA Northern California's Most Complete Ham Store tion diodes. Indeed, under certain conditions where germanium junction diodes are required, these can be ideal e.g., lower sensitivity to transients, lower forward voltage drop. But remember that a silicon transistor becomes a silicon diode, and is just as sensitive to PIV overload. A fact often overlooked is that the reverse-biased base-emitter junction of many silicon transistors makes an excellent...

Noise Source

Ip Diagram of the Omega-f Antenna Noise Bridge. A wideband noise source is connected across one side of a balanced, quadrafilar wound transformer the receiver, antenna and calibrated potentiometer are connected across the other .a professional approach to en closing experimental projects. Designed with external appearance worthy of the time involved in circuitry and layout, a new enclosure has been introduced by JUSTIN, INC Extruded aluminum side plates for strength, beauty and rigidity....

Info

Fig. 2 Suggested printed circuit board for the transmitter. The foil side is shown In 2A and the parts location in 2B, Fig. 2 Suggested printed circuit board for the transmitter. The foil side is shown In 2A and the parts location in 2B, ing the meter for minimum current. Repeat several times until you're sure you have maximum drive from the oscillator and minimum current in the final As mentioned previously, the output is slightly unconventional. Tuned up in this manner, the dissipation is...

Iio Vac Ih

Block diagram of the complete 2 kW PEP 6-meter transver er, Input and output are both at 28 MHz. timum conditions, and maximum output of approximately 6 watts will be obtained. This power is more than sufficient to drive the 4CX1000A finals but can also be used for local contacts barefoot Voltage requirements are as follows 6360 B , 250-300v oscillator, H-1050v regulated mixer, 250v and all filaments, 6.3v 2 amps. Two 6CW4 nuvistors are used in a cascode rf stage in a low-noise front...

Scc

Has space for both 2 and meter Converters T power supply, xtal calibrator and extra converter. Switch position permits receiver to be used direct. SC M Crystal controlled 100 KHi FET oscillator Integrated circuit divider gives 50 KHz markers Output 2000 MV at 14 MHz, 250 MV at 50 MHz, 5 MV at 144 MHz. Size CPS-1, Wt 11 OZ Crystal Control Unit forTR-4 Model FF-1____ 24,50 Plugs into socket in bottom of TR-4 Gives two crystal-controlled channels in ham bands Three-position switch provides 1...

Wgxn

Lt Webster's New Collegiate Dictionary, 1961. C amp C Mexriam Co., p, 6852. General Electric TransiHtor Handbook, 71 li Edi- Fig. 7 The pulse generator. This unit uses integrated circuits and transistors to provide pufse repi j ion rates from 20 Hi to 200 kHz, pulse delays from 20 microseconds to 20 milliseconds and pulse widths from 20 microseconds to 20 milliseconds. A square wave output Es also available, Fig. 7 The pulse generator. This unit uses integrated circuits and transistors to...

L

Hitch your Hurricane to a Hygain Thunderbird Tribander Beam . . . specifically, the ALL-NEW 6-element TH60X for the ultimate in tribander performance and mechanical reliability on 10, 15 and 20 meters. Superb on OX and other long haul contacts. Separate Hy-Q traps, featuring large diameter coils developing exceptionally favorable L C ratio and very high Q. Peak performance on each band phone or CW. akes maximum legal power. Model TH6DX, 149.50 The new, improved 3-element Model TH3Mk2...

Wdty

For some unknown reason, military surplus Model 15 page printers more often than not come without paper spindles, 1 made a more-than-adequate substitute by wheedling the chemistry department out of two 1 tapered rubber stoppers with a center hole. When pushed on a shaft made of any rod material that will fit the machine, the stoppers do a good job of wedging the paper anywhere on the shaft. The problem of re-inking faint ribbons is easily solved. Actually, no re-inking is necessary very seldom...

Ideal For S Meter

A 7r i00 0 gt lt 400 D iJ 1000 n 4Sr 3 2N1613 NPN SIL. 120 mc, by Kheom _ 1 3 45 AMP POWER RECTIFIERS, uni. S 2N706 3COMWd 300MC NPN Iran , TO 18 10 PNP SWITCHING TRANSISTORS, no test, TQ5 . 1 75 TOP HAT RiCTIHERS, ailicon, 7 0 ma, no test 1 4 BIDIRECTIONAL TRANSISTORS, iSNHUi . . 10 NPN SWITCHING TRANS'TRS, 2N3fl no test 1 15 PNP TJ ANS'TRS, CK722, 2N ir,H 107, no Lest 1 IS NPN TRANSISTORS, 2N35t 170, -no. I10 test 30 TRANSISTORS, rf. If, audio osr-ifs, TOfi no test Jl 4 - EPOXY TRANSISTORS...

Wavemeter for

The 220 MHi wavemeter built from a Lafayette TM-14 Radio Field Indicator, The 220 MHi wavemeter built from a Lafayette TM-14 Radio Field Indicator, I have frequently noted the old Lafayette model TM-14 Radio Field Indicator among I he archives in many ham shacks, I had one collecting dust and decided to see what would evolve with a little experimentation. Result a wavemeter for 220. First, remove all the innards except ihe meter on the front and the antenna receptacle on the top. This includes...

Accessories for the Novice Ham Shack

Howard Pyte W70E 3434 74th Avenue, S.E. As a youngster you became the proud possessor of your first bicycle, Basically, this was nothing more than a pair of rubber tired wheels mounted in a metal frame equipped with a steering device, a seat for the rider, a braking device of some sort and a manual propelling mechanism. As your riding ability improved, you no doubt added numerous gadgets from time to time, gei gt erally for two reasons. First, and at your tender age probably of most importance,...

The Omegaf Antenna Noise Bridge

If you have to adjust any antenna matching sections, determine antenna resonance frequencies or cut coaxial lines or J wavelength long, the new Omega-t Antenna Noise Bridge is one of the slickest little gadgets around. When you Ye trying to prune an antenna or tune a gamma match with an ordinary antenna impedance bridge and griH-dip oscillator, von almost need five hands. Not so with the TE-7-01 Antenna Noise Bridge it will fit in the palm of your hand and lie only auxiliary equipment you need...

Davco Electronics

Tallahassee, Fla. 32304 I'd like to find out more about the Davco DR-30 Receiver. Please send me FREE DR-30 Data Pack 8-page technical brochure, large-size schematic and reviews by the staffs of QST, CQ, and 73. Complete 48-page instruction manual including theory of operation, description of circuits, specifications, how to use the DR-30 and what to expect from it. 1 enclose 2 refunded with order for DR-30 . Davco DR-30 Communications Receiver. I enclose...