Radio Amateur 09-1971

Hep 553 Transistor

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....

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...

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...

Radio Amateur

925 Sherwood Drive Lake Bluff, III. 60044 925 Sherwood Drive Lake Bluff, III. 60044 the exception for an amateur station, and many hams simply shut down their operations for considerable periods of time until they learned how to overcome the problem. They had good reason to do so, too. A woman scorned may equal the fury of a televiewer whose picture is suffering interference, but it would be difficult to convince those hardy hams who have faced both furies that the one resulting from TVI wasn't...

Editorial By Wayne Green

Jinx that has shot down every special interest publication in amateur radio so far, including their predecessor, FM Journal. It is, I can vouch, extremely difficult- to put out a ham magazine when it is of interest to everyone, and just about impossible when you cater to one special interest, such as repeater owners. Every owner should subscribe to the magazine - it's for you, so support it. If you don't support it, you won't have it long. It is expensive to put out a magazine, even when the...

Freck Radio Supply

38 Biltmore Ave,, Asheville, N.C. 28801 (704) 254 9551 Large Stock of Used Equipment. FREE list upon request. We stock Collins Drake Galaxy Kenwood Signal One*Swan Tempo Hy-Gain Newtronics Several Others. Tenny Freck W4WL - Sandy Jackson Mgr. Harvey Nations W4VOV Fig. 3. Possibilities for using the resistive section of the photocell for control of the signal amplitude in an audio amplifier. Voltage divider method (A) and capacitance bypass method (B). upon the normal operation of the audio...

Build A Solidstate Module Tv Camera

I imagine almost everyone involved in electronics in this day and age has, at one time or another, wished he had a closed-circuit TV camera for one purpose or the other Whether it be used around the home to keep an eye on the kids or in your business for surveillance purposes a CCTV camera can be an extremely valuable tool. While numerous assembled cameras can be purchased on the market today most of us have that ever present urge to do-it-ourselves If you are a little rusty on TV circuit...

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,...

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...

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...

Telco Contest

This year the Indian Hill ARC at Bell Labs Indian Hill facility, Naper-ville IL, will host the 12th annual CQ-Westem Electric' contest for all licensed amateur radio operators employed by or retired from Bell Laboratories, Western Electric, AT& T, and Teletype and Sandia Corporations. The objective of this world-wide contest is for each participant to contact as many other participants as possible via ham radio. The contest will be held on the first three weekends in October with each...

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...

Copper Strap

The growth of ham radio in the last 5 10 years has been anything but encouraging. The numbers tell the story loud and clear While population, leisure time and disposable income have all increased, ham radio has remained stagnant. Unless we reverse this alarming trend, we will join the dinosaur in Nature's list of species that no longer exist. Why we have let this situation develop is a question I will leave to the psychiatrists in our ranks to discuss. What can be done about it is something...

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...

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...