Diode Circuits Handbook

Covers rectifiers, meter circuits, mixers, detectors, mo du fa tors, products, FM detectors, noise limiters, squelch, AGC, BFO' Q-multipller, icstr protection, AFC, Varicap tuning, audio clippers. FM modulator, balanced mods, Varac-tor multipliers, f i e J d-st re n g t h meters, wdvemeters, RF probes, dummy loads, SWR bridge, tachometer, noise generator, square-wave q& r t leners, control circuits, voltage control, etc, til different circuits.

Now

This article will show you how to match any feedline to an antenna and get an SWR of less than 2 to 1, There is no restriction on antenna type or feeder length, All that is required is an SWR meter however, knowing the approximate antenna impedance will do. First, I'll tell you how I came across this idea. I had just moved and no longer had any good trees for stringing up antennas, I looked through some old 73* and came up with a bi-square antenna. It looks like a single element from a Quad,...

Qg

Fig, 3, Effect of receiver mistuning on SSB signal is to shift pitch of all parts of signaL IGO-cycle tuning error, bottom, makes all parts of signal 0G cps too high. This is small error for high-frequency portions, but is 100-percent error for lows. Result is almost unintelligible signal. With DSB, result is worse some of wrong sideband gets into output. tion at any stage after it is generated, or the individual frequencies within the band wili mix with each other to create sum and difference...

Box Bronx Ny

Army Radio Station La Plata, Maryland 20646 There have been a couple of good articles in 73 about what to do to reduce the huge pile ol magazines you have on hand and to increase your chances of finding a particular But even with these fine ideas I still find myself having to look through most of the magazines to find the article I want. The annual indexes help, but even with those I still have to search a lot. Another problem I have encountered is magazine portability 1 am in the Army and move...

Television Telemeter

TELEMETER PAY TV PROGRAM SELECTOR M , Choice of 3 program 6 that tone operated in the VHP band, with provisions for depositing the amount of money required for each program as indicated on the coin register, and that also shows a credit balance when an oTer-payfqfent ruadg A pre-tfeoarded tape wilt give program information when desired. With Tubes 1 13BH7, 1 6BE6* 1 6BAS 2 GUS 4 speaker, coin mechanism, tane magazine, etc, fciae 15 x t s 7 Wti 25 lbs. 1001 5

Leger Laboratories

Groton Street, East Pepperell, Mass. 01437 Phone 617-433-6771 If you have a question which can be answered adequately through the mail, look th rough the following list of TAG members and write to one whose specialty covers your problem area. Be sure to ex-p ain your problem clearly and write legibly, Enclose a Self Addressed Stamped Envelope for a reply. Do not ask a member to design a piece of equipment for you. The purpose of this group is to assist the ham with problems he encounters in the...

Info

2Ni70 Germ Audio, Gain over 100 10 FET's mostly C6ID-C6I5 types, w spac sheet 3 200 miniature glass diodes, unchecked 200 VARACTORS experimental pack w sheet 20 2m & Hi freq 2 watt TO-5 tS VARACTOft 40 Watt sfm to MA-4060A w cir. ea, 4,00 IN25 Silicon diode, UHF mixer 20 TO-5 S L power m * 2N496-2N54 -2N54 10 TO-3 Mix, 20-50 watt, 2N155*2N255 8 MICRO TRANSISTOR Planar Epitaxial w sht 25 FLY SPECK trans itor, micro miniature 6 & -SWITCH make lamp dimmer etc. wAheet 2 2N404 Popular type PNP...

Herbert W Gordon Company

Qmatch Quad

Woodchuck Hill Road Harvard, Massachusetts 01451 Helping Hams to Help Themselves George Johnson WAIBUN 43 Raymond Street Nashua, N.H. Tn 1965 I moved to the city of Nashua, New Hampshire, into a house which had no antenna facilities whatsoever. Having had consid rai gt le experience with beams in the past, and knowing their limitations, I decided this time that I would put up a it uad. The quad had a reputation as being a fine antenna, and yet there was a considerable amount of discussion on...

Antenna Height Above Ground

Diode Balance Phase Detector

Fig. 4 The d pole's input characteristics depend upon height. Here are the two important numbers again 0,2 and 0,5 wavelengths. Ftg. 3, The dipole has two basic radiation patterns. Here they are, as seen from the dipoEe's end, The dipoles electrical properties also depend upon distance from ground Fig. 4 shows how the input resistance varies with height, For best results try for some height near one giving a 300-ohm input resistance. Although the dipole is said to show zero response or...

Correction

In the VHF Remote Control article April, page 32 please change the 35 second timer in Figure 7 to a 3.5 second timer. Also, on the voltage control relay, connect points two mid three with a jumper. This is fairly, but not completely obvious from the diagram. D. E. Hausman, VE3BUE, 54 Walter Street Kitchener, Ontario, Canada. Would like primarily to help Canadians get their licenses. Would be able to help with Novice transmitters and receivers. Frank M, Dick WA9JWL, 409 Chester St, Anderson,...

Are Phone Patches Legal

Probably every amateur that has connected a phone patch to his radio system has experienced the fleeting and cursory twinges of guilt that accompany each soldered connection , Or the flash of anxiety each time he sees a telephone company truck parked near the QTH. Are phone patches legal Many self-respecting commercial producers of amateur radio gear include complete packaged hybrid telephone patching units in their basic equipment lines Following a logical line of reasoning, then, an amateur...

Wblz

Use, Is one of the most dependable testimonials of endorsement, and Telrex products are in use in 139 Lands .Beamed-PowerANTENNAS BALUNS . V. KITS and ROTATOR SYSTEMS Most Technically-Perfected, Finest Communication Arrays in the World Precision-Tuned-Matched and Balun Fed for Bafanced-PatterrT to assure 'TOPMAN ON-THE-FREQUENCY'' Results Enjoy World renown TELREX performance, value and durability Send for PL68 tech. data and pricing catalog, describing professionally engineered communication...

Gamma Match

Please double ten meter element lengths to correct for drafting error. The antenna can truly be called the front end of your rig. Regardless of the quality of the receiver or the transmitter the results that will be achieved will be dependent on the antenna. To achieve the maximum transfer of energy to or from the antenna there are some items which are necessary to any antenna installation. 1. The elements should be full resonant 2. The driven element should be resonant at the design frequency,...

Antenna Mart

Toroid Power Transformers These are New and unused T- This toroid was de i iiuiri for a I i tube SO watt output FM mobile unit. With schematic. 12VT gt C PRI, uslnfi 2X1554' or equivalent, DC output of V DBLR 575 rolts at 130 watts. Sec, V2 100 volts DC bias. Sec, 3 CT feed back winding for ZNl554's. 1 4 thick, 2 ' dia. if T-2 This toroid was deslftned for use in a hybrid mobile unit, using a single 8647 tube in the RF amp. for 30 watts output. Schematic Included. 12 YDC prL usinp 2NI554'b or...

Radiothermometer Clockhumidity

Novelty combination suspend on wall with gold colored chain, on stand or table. Round maroon plastic cabinet with brass colored front rim. In one unit you get an alarm clock, a thermometer, a humidity indicator and a six ti ansistor radio. Uses a standard 9 v battery, Has been sold around the world lt IWd to commercial ship operators and Monitor amateurs. The n w Trans-Key TM is a new development for Q95 ham radio by licensed hams. A highly sensitive relay driven by a blocking oscillator...

New Concept In Its Exciting Beam Antenna Program

Any knowledgeable DX'er will tell you the secret is in the antenna. For over a year Henry Radio has provided an exciting beam antenna package program allowing the average amateur to own an efficient, and unbelievably economical antenna package . . . pre-engineered, pre-matched and pre-packaged to suit his pocketbook and requirements. NOW This world famous antenna program moves forward. NOW1 You can have the antenna of your choice at the same incredible saving. Tristao CZ-337 New concept 4Q ft....