E

A com piece course of instruction s on the tape. Practice material at 5. 7. 9 WPM. Prepares you for Novice exam. Includes code groups- and purtc tuation. CM-114 An intermediate tape, especially for General Class exam study- No instruction just practice. Vt hr 11 WPM, 1 hr 14 WPM Vx hr at 17 WPM. Includes coded groups and Straight text. CM-2 For Extra-Class license study. Mostly straight text, some code groups. 1 hour at 20 WPM. Vt hour each at 25 and 30 WPM. For real QRQ,...

Motorola

K8YQH 1335 Brainard Woods Dr. Dayton OH 45459 If you are as fascinated with the possibilities of operating the 2m FM bands with hand-held portable gear as I am, you probably have more than a passing familiarity with the Motorola HT-200 (the brick, as it is known in some circles). Until recently, this piece of gear has been difficult to pick up on the surplus market. Lately, however, Motorola has released the HT-220, a shirt-pocket unit with approximately the same...

Electronics

LOUIS, MO 63112 314-726-6116 DIGITAL C CLOCK-Six Digit C Clock using seven segment readouts. Complete with all components, pre-punched board, case, and instructions. Ship wt. 1 lb. 115 volt ac model 79.50 12 volt dc model 110.00 MINITRON 7 SEGMENT DIGITAL READOUT 5 VDC1 rated-Sma per segment 50 000 hr design life-mates with standard IC socket or can be mounted directly on PC board. Dimensions .45 inch wide .37 inch 7447B Decoder Driver, 7490 Decade Counter 7475 Quad Latch...

HEP

Maximum signal voltage 4.QV Maximum supply voltage +12V Operating temperature range +15 to +55 C Package TO-99 (socket HEP 454) REPLACES MC881G (smaller temperature range) MC981G (smaller temperature range) Fairchild U5D990029X (lower power ratings) Maximum signal voltage 4,0V Maximum supply voltage + 12V Operating temperature range + 15 to +55 C Package TO 99 (socket HEP 454I REPLACES MC882G smaller tehiperature range) MC982G smaller temperature range) Fairchild U5B992329X (lower po> -ver...

S B

948-A Avenue E Riviera Beach FL 33404 (3051 844-1323 The leading manufacturer of 18 facsimile weather chart recorders is in the process of converting an existing network for fully automated weather chart transmission. This conversion will make available a number of used 18 weather map recorders ideally suited for use by anyone interested in experimenting with facsimile. They include the recording head, all necessary electronics including automatic start, phase and stop circuits. Operating at...

M

18669 Ventura Blvd. 2837 North 24th Street Box 138 Tarzana, CA 91356 Phoenix, Ariz 85008 213 342-8297 602 955-4570 amplifier, since the thermal inertia of the lamp in the photocell module will wash out instantaneous level variations. The photocell module itself can be any one of a number of Clairex or General Electric units which sell for S3-S4. The Clairex CLM3006 unit works well for a general variety of applications. Its lamp drive Assembly of compressor agc units on Vector-board. Photocell...

Rm

Interfacing hetween the ECL section and the DTL-TTL buffer is an MC1018P translator IC. This IC requires ground, 5V, and -5.2V for supply connections. A simplified circuit of the MCI018P is shown in Fig. 3 as used in the pulser. Of course, such a circuit could be built of discrete components, but not as simply and inexpensively as using the MC1018P. If the MC10I8P is hard to find, the MC1018L may be used. It is the same chip in a ceramic case, and is being sold at a slightly higher price than...

Fluorolue

Sonic lens action for illumination substitute sonic radiators for detectors. Power gains of 30 dB and over one thousand times in power and sharp beams are obtained by such lenses, as shown in Fig. 3, which details patterns and gains from actual tests underwater. When a sound wave retina of small hydrophones is placed 011 the focal surface at the rear of the lens, as in Fig. 1, a sound wave image of the scene out front is produced, when such scene is illuminated by sound waves from one...

Urn mum

Olympic Blvd., Los Angeles, Calif. 90064 213 477-6701 931 N. Euclid, Anaheim, Calif. 92801 714 772-9200 Butler, Missouri 64730 816 679-3127 Bill Hoisington K1CLL Far Over Farm Peterborough NH 03458 Bill Hoisington K1CLL Far Over Farm Peterborough NH 03458 Those of you who have been following my articles in 73 know that 1 am, basically, a tinkerer. I love to take a new component and see what 1 can do with it. It may be a 432 MHz oscillator using a 30 transistor or...

Info

When Allied Radio Shack sets out to build the two best buy receivers on the market, you expect a lot' And you get it A4-FETfront end with 0,5 uV sensitivity on SSB CW at 10 dB S N. Crystal controlled 1st oscillator and BFO for best US8 LSB CW, Pre-selector. 25 100 kHz calibrator. Dual conversion. Ceramic filter. AGC and ANL. Q-Multiplier. Concentric RF AF gain controls. Anti-backlash dial with J 00Hz visual readout. Dual 117VAC 12VDC supplies. And everything else you need for the DX you want....

Kagz

LIMITED SUPPLY AT THIS PRICE If you have any questions please call 213-271-5845. A1 Hoffman, Los Angeles CA 90046. FOR SALE Marker Luxury 2-meter FM transceiver SI00 under Drake price. Accessories. Crystals for 34 94 Ship express or bus COD. 230, No trades. W5PEK. CASH FOR COLLINS 75S-3B RECEIVER. WB5BFZ 3008 Southwestern Blvd., Dallas TX 75225. 214-361-6611 daytime. 2-METER FM 10-20, solid state, mint condition w mike, mount, Xtals for ,34 ,94. f94 .94, .76 .76. Almost new. First...

Corporation

H. 03103 If you're not buying your replacement vidicons from GBC, you're wasting money. These are brand new, first quality, fully guaranteed tubes In factory sealed cartons. Made by Hitachi. How do we cfo it Tbe answer is volume. GBC sells more than 90 of the replacement vidicons used in this country. Model 7735ft Very high sensitivity. Provides sham clear pictures even at low light levels, with miniinum lag . , 34.5D Model 507 Similar to 7735A, but separate...

D

MC876P smaller temperature range MC390P smaller temperature range uL923 two units instead of one U5B992329X two units instead of one PL992329 two units instead of one BASE DIAGRAM Maximum signal voltage 4,0V Maximum supply voltage I2V Operating temperature range 15 to 55 Package TO-99 8-lead transistor-sized, socket HEP 4541 REPLACES MC810G smaller temperature range MC910G smaller temperature range MC710F different package MC810F different package, smaller temp, range MC910F different package,...

Sentry Manufacturing Company

Crystal Park, Chickasha, Oklahoma 73018 -PHONE 405-224-6780 TWX 910-830 6925 - The receiver second oscillator is the small square board with the foil side facing upwards, just to the right of the filter NRD1I31BB in the center of the board. The assembiy is held in place with the screw just to the left of the board. The receiver second oscillator is the small square board with the foil side facing upwards, just to the right of the filter NRD1I31BB in the center feature, you'll need a couple of...

Saxtn Products

Route 303, Congers NY 914 COS-6846 frequency rf i f amplifier with noise figure of 5 dB at 60 MHz and gain of 30 dB HEP 590 , a combined amplifier discriminator for FM i-f use HEP 591 , a stereo preamplifier with two separate high-gain audio amplifiers and external equalization of frequency response HEP 592 , and a 1W power amplifier HEP 593 . To make it simple to use these units to replace other types of ICs which may be called for in various projects, we've prepared a series of charts...

Fairchild Philco Rca Motorola National

UL 923 JK Flip-flop _ 1.50 10 8.50 MC 790P Dual JK Flip-flop 2.00 10 18.95 MC 890P Dual JK Flip-flop . 2.00 10 18.95 MC 789 P Hex Inverter MC 724P Quad 2 Input Gate H'Sio MC 799P Dual Buffer I IO 9-Z5 MC 7SOP Decade MC 767P Quad Latch ______________________ 3.00 MC 9760P Decade ______________________________ 5.00 ONE EACH OF 3 ABOVE 10.50 7400 Quad 2 Input NAND Gate 65t1 10 5.S5 7404 He 7473 Dual JK Flip-flop 1.30 10 10.95 7475 Quad Latch 7490 Decade Counter 2.40 10 19.95 709 Op Amp 741 Op Amp...

Electronics Fair

Florida, is holding an electronics fair, Sept 9 12. The first two days of the fair are directed to special industrial and government buyers and engineers. The last two days, however, are for the public, with manufacturers' displays and prizes. The event, celebrating Grice's 25th anniversary, is being promoted in all the media. Many new consumer oriented devices are expected to be exhibited. Amateurs in the area might write for more information to Grice Electronics,...

New Mexico Hamvention

Will be presented 17, 18 and 9 Sept. 71, at Sheraton Motor Hotel, Albuquerque. Technical Sessions, Top Speakers, Ladies Program. Entertainment and Swapfest. Banquet on IS Sept. For Info and Registration NEW MEXICO HAMVENTION. Inc., Box 14381. Albuquerque. New Mexico 8711 1. SALE RCVR RCA CRM-R6A tunes 80kc to 30mc, sliderule dial, triple conversion, provision for mechanical filters. AM SSB CW. Cost over 1 000 Best offer takes it COD. Foss, 1517 N. Main. Walnutcreek. California 94596. TELETYPE...

I

90652 Solid State Dipper

Minn, has announced the production of a new R-V-CHARG unit. The R-V-CHARG model 50-125 is a compact solid-state controlled unit which allows the amateur radio operator to operate his mobile equipment from a separate battery while parked with the automobile. It automatically disconnects the main starting battery in the vehicle when the engine is off. This R-V-CHARG equipment has the advantage of keeping both batteries charged while the vehicle is running. R-V-CHARG...

Southwest Radiometrics

Mex 87107 Telephone 505 345-0768 505-762-2234 Alst Power Supplies. Amplifiers, Modules, etc. Write - Dept. 73 Alst Power Supplies. Amplifiers, Modules, etc. Write - Dept. 73 In hookup, proper observance of polarity must be foremost in mind when connecting the unit to the battery. Negative ground must be used or a transistor will blow out Incidentally, improper polarity voids Mark s otherwide excellent warranty , A feature I appreciate is that both input and...