Cs

And believe it or not, 455 kHz isn't it William Hoisington K1GLL Far Over Farm ' This article is a two-part series that deals with design methods, components, and circuits using solid-state devices leading to an i-f system that will meet the special requirements of the amateur builder who wants a reasonable-cost, selective, low-image, tunable i-f for use following converters on 6 or 2 meters, or the UHF regions above 420 MHz. This portion of the series describes design details of the 1.65 MHz...

From The Makers Of The Famous Galaxy Transceivers

The Galaxy FM-210 2 Meter FM Transceiver Now every Amateur can buy Galaxy's well-known quality and performance in a 2-Meter FM solid-state, FET front end trans-cetver offers no compromise performance for direct or repeater communications a full 5 watts of Power tor 10 watts with the optional AC-DC Power Booster ) Check these specs and you'll agree it's a lot of Transceiver for only 199,95 See one .try one 'Pacesetter in Amateur Commercial Equipment Destgn ' 10 South 34th Street * Dept. 73-FF46*...

Staff

Roger Block Jane Tracey Jeanne Caskie June Trasky Whitney Tobias Bruce Marshall Nancy Estle 18 Extra Services From Your Grid Dip Oscillator WA4UZM Like checking crystals, tuning FM receivers and such, 20 Reverse-Current Charging K8YUC Turns out you really can recharge flashlight batteries 24 A Poor Man's Frequency Meter W6YAN 29 Professional PCs From Roll-Your-Own Negs K6MVH Eliminates drafting, camera work, and darkroom entirely. 36 How I Read The R. O.'s Handbook & Found Happiness . , . ....

Into an A crystal calibrator

One of the handiest instruments around the average ham shack is the grid dip oscillator, but many hams do not get all of the advantages this little instrument can offer. Most people know that it is useful for finding the resonant frequency of an LC circuit, or for generating a signal someplace in the range, although it is not quite a substitute for a well calibrated signal generator in this respect. dip oscillator makes an excellent crystal calibrator as well. The typical grid dip oscillator...

Info

Find out that travel was of most interest for Eberhard and Use. Boston. Niagara Falls, Montreal New York City, and the local area were of prime interest. A trip was also ai ranged lo Washington D,0. for Eberhard. Needless lo say, we had a full four weeks, I took a two-week vacation and combined it with the long Labor Day weekend to cover the areas outlined. We used a camping trailer for everyone including the children. Phis really cut the expenses and placed everyone in the person-to-person...

Jo

What makes the Radio Handbook so different from the others This is the only handbook that has all original material rather than just being a bunch of reprints of magazine articles. The hundreds of construction projects were built specially for this handbook by some of the top amateur radio builders. This is a hardbound book, with some 850 pages of theory, construction projects and reference data covering every aspect of amateur radio. Ten dollars doesn't stay around very long these days, but...

Ct Not Used

Sam u ei KeUy V 6JTT 12811 Owen Street Garden Grove CA 92641 Sam u ei KeUy V 6JTT 12811 Owen Street Garden Grove CA 92641 The surplus situation out here has been pretty bleak for quite a while, so I my luck was bound to change, While wandering through a local junkyard I noticed a small olive-drab box on the scrap pile. Inside was a compact transmitter-receiver covering 2 to 12 MHz The junkie had decided not to melt it down because it had too little copper in it After brief negotiations 1 parted...

Zip

'ake a look at the surplus ads in this issue and you may be a bit surprised by what is turning up on the market these days. For instance, a random sampling of a recent issue shows one ad featuring a 6,400 memory drum * faced by another which offers brand new RTL integrated circuits. Elsewhere in the same issue we find universal logic circuit cards, and a potpourri of dual 4-input nand gate quad 2-input nand gate ' and 4tJ K fhp-flop master slave1 IC chips. That's all a far cry from the...

Wbadf

Vfnhy is it that the only audible station on the entire 20 meter band has an operator who speaks only Esperanto and I have no way in God's world of making con tact the only 9M6 I ever heard was when the XYL gave me the supper ultimatum on the double the one maritime mobile I really wanted came back to me when my swr bridge took a turn for the worse, the most important phone patch 1 ever tried was lost in band transition the one opportunity to impress a VIP resulted in a uno propagation day...

K

Circuit of the oscillator mixer to be built into the existing front-end deck. funetiqns as the mixer. The carrier frequency to be monitored is picked up by the VHK antenna, amplified by the 6AK5 amplifier, and then mixed with the selected channel crystal frequency. The output of the mixer is fed to the calibrated monitor receiver where it is determined if the transmitted carrier is on frequency. Assume that it is desired to monitor the output of the transmitter which is operating on...

Lamp

Fig. lm This simple circuitr known to electricians as a three-way switch, for controlling a light from two separate locationst is also a rather exotic digital logic circuit. No gate used in digital logic is any more complex than this circuit, though it may have more control points. Fig. 2. Truth table describes all possible conditions of a three-way switch circuit. Left two columns show switch positions and right coiumn shows lamp condition which results from each combination of switch...

Stellar

As a barefoot mobile unit, the American-made Galaxy FM-210 runs a full five watts of power. Just connect it to your antenna and clamp it under the clash-then plug in a high-impedance mike and you're off and running . , , on three crystal-controlled channels The receiver section's FET front end gives you unmatched selectivity and sensitivity. And the transmitter's husky signal gets you through even in those dead spots ' if the nearest repeater is in the next county or if the activity in your...

O

In its comments, ARRL pointed out that the 1 4 U gt 1 40 MHz band was assigned to the Amateur EUdio Service on a world-wide basis, and that the 146,0 148 0 Mhz hand is authorized to the Amateur Radio Service in Regions Two Western Hemisphere and Three Southern Asia and Oceania , and to the fixed and mobile services in Region One Europe, Africa, and Northern Asia that while the 144.0- I U A Mli band is specifically authorised for am,item satellite operat ion, the present 147,9 148.0 MHz....

Tv

Acpowet supply for Motorola FMTRU-41 V. Original supp y is shown in companion article. Fig. 1. Acpowet supply for Motorola FMTRU-41 V. Original supp y is shown in companion article. Step-by-step modification 1. Remove RED lead from CI OA and connect it to power socket pin 7. Connect power socket pin 1 to CI OA. Connect power socket pin 2 to C9A, 4, Connect power socket pin 3 to terminal 10 on transmitter power supply-strip, 5. Connect power socket pin 8 to ground. 6 Remove yellow lead...

Easy Diode Testing

Sonobuoy Amateur

Edwin Kirchhuber K4JK 2804 Broadview Drive Huntsvilie AL 35810 With the advent of 'bargain diodes, we must test before using, especially if they are to be used in series what else . The simplest method I have found is to use the good old vtvni and a power supply capable of providing 1000V. t used a 40 mA transformer 275-0-275V in a half-wave circuit. The filter is a couple of 450V electrolytics in series. Any value from 8 to 80 juF is okay, The hot lead coming from the power supply lias a t 1 W...

Desk Name Plate

We sold a boodle of these at the last big hamfest. You can order your name and call on this handsome desk plate in up to 20 letters and spaces. Immediate delivery on all orders, too. The plates are brown walnut stained and a real value at only 2,00 pp. Simple Inexpensive Effective S14.95 Model SE-405

Vjrgo

Probably every ham goes through Mie cute phonetics stage at some point early in his career. started looking around frantically for something clever back in 1956 when I had a column in Western Radio Amaieur, a west eoasl publication published by Don Williamson W6JRE. f wanted something snappy, like Never Say Die 'bin my call, unfortunately, didn't end with NSD. Quite coincidental , during a kite night QSO with my half converted military surplus transceiver, someone I don't even remember who...