Radio Amateur 05-1996

Antenna Noise Bridge Detector

Noise Bridge

Tune your antenna, then measure its radiation pattern with this pocket-sized instrument J, Frank Brumbaugh KB4ZGC Box 30 - c o Defend in i Salinas PR 00751 Using an antenna noise bridge is one of the best and simplest means of measuring antenna characteristics. It is invaluable for tuning an antenna, especially a beam, to resonance at a desired frequency. Normal ihe station receiver is used with the noise bridge as a detector to indicate die resonant frequency of the antenna, and the...

The Neat m Amplifier

Tentec 1551 Schematic Diagram

A great pair of shoes for your HT or data radio. Photo A. Tuning ir up to 35 watts, just like the specs promised Bill Richarz WA4VAF 10035 Little Creek Road Charlotte NC 28227 f you are using an HT or other low Lpower radio for packet, you may want to try your hand at building this Ten-Tec 2-Meter Amplifier Kit. Even if you're not using your HT for packet, you can take the ''scratch oul of your Handi-Seratchy so everyone will hear you full quieting, and love you for it. Recently I acquired one...

Belcher Islands DXpedition

Winston Seeney VE3WFS 224 Cornwallis Court Oshawa, Ontario L1H 8E8 Canada If my wife could have seen mo ai that moment, she would have written me off is a madman. What teacher in his right mind would begin his summer cation standing with a friend au gt p ihe airport garage at Sanikiluaq.1 The arctic wind whipped our pant legs like Hags. The coax and guy ropes danced to iheir own senseless rhythm. From moment to moment, the precipitation switched luck and forth from rain 10 snow to rain seemingl...

How to Make an Old HW

Gerald R Gronson K8MKB 3529 Belinda Dr. Sterling Heights Ml 48310 The next time you see an old Heathkit HW-8 at a flea mar kelt grab it. With maybe an hour's work you can put some pep into this old 'hot-water baby and have fun, Here's how I substantially improved one. In looking at the schematic, I could see that the receiver section was pretty good, but that the resistor and capacitor values were not the hest choices. I could squeeze better performance out of this puppy. Since the audio board...

Tape Wound Antennas

Peter Laakmann WB6IOM The Highlands Seatlle WA 98177 Using hiic P C plumbing components and adhesive coppcr tape, you can build microwave UllF helicals or HF VHF verticals, di-poles and beams efficient, good-looking antennas that lend themselves to endless fun and experiments. Simply wind a desired pattern of adhesive copper tape onto the pipe. The tape, designed for direct soldering, can he cut to any width by suppliers from stock logs of up to 20 inches, making his a printed circuit approach...

Speech Scrambler

Descran s r-os saamfc systems heard on your scanner radio or set up your own scamptec communication system CFver trie phone or rat o Laiesi 3rd generation iC is used tor tan stic audio quality - equivalent to over 30 op-amps and miners' Crystal controlled tor crystal Clear sound with a built-in 2 watt airdio amp tor direct radio hookup For scramble systems, each user has a unil for full duplex operation. Communicate in privacy with the SS-70. Add our case set far a fine professional finish...

Build the Bioelectrifier

Bioelectrifier

Heal yourself and take a poke at the medical establishment at the same time Thomas M. Miller WA8YKN 314 South 9th Street Richmond IN 47374 One of the first things a new amateur learns is that electricity and biology are not very compatible. A brush with the AC line can be a painful experience, and accidental contact with the high-voltage supply of a large transmitting tube can be fatal. Because of this early training, occasionally reinforced by an unpleasant accidental jolt, it might surprise...

Circle On Reader Service Card

I made a belt clip from a strip of steel banding material and glued it to the back. 1 also glued a two-pole terminal strip to the end of the box to connect the electrode leads, although a plug and jack w ould be fine. I used u hat I had on hand. Electrodes for the prototype were simply strips of aluminum foil, folded to form two strips several layers thick, 2 inches wide and 12 inches long, Wrapped around each ankle, the foil was held in place by rolling the socks up over ii. Later, a better...

Simple Multiuse Amplified Speaker

Frank Brumbaugh KB4ZGC R (X Box 30 - c o Defendini Salinas PR 00751-0030 So you've built that nice kit transceiver, and you want to use it in your shack. You've got two problems right away First, it was probably designed to run off batteries, and second. it probabh doesn't have enough audio power to drive a speaker. Many kits are designed that way to save mone and to make them portable. The power supply and audio amplified circuits add weight raise costs and create current drain that makes...

Break The Code

B A RR IER Psychologist & Extra Class operator has developed an amazing hypnosis tape that allows you to master any code speed easih and quickly. To order send 14.95 + 3.00 S& H to Dr. Hal Goodman. P.O. Box i 84, Eastpori. ME 04631. For more info, send SASE. BNB203 SP-10 Transceiver Kiti January 73(Just 65 postpaid USA CAN, Lcctrokit, 401 Bogart, Sandusky, H 44870. BNB20II QSL CARDS Many Styles, Top qualify Order Risk Free-Plastic cardholders, T-Shirts, Personalized caps, mugs, shirts....

The Difference Is Dedication

Alfred A Mrkalow III K700Z 55371 McDonald Road Vernonia OR 97064 The snow had been building up in the mountains. In a week, ai the 1200-foot high Vernonia Peak Observatory, 15 inches had fallen. The higher mountains had received two feet or more. Then the rain started. A iayer of ice half an inch thick covered the snow. On February 4. 1996- weather patterns changed and the Jet Stream moved from the Arctic to the Tropics, . te precipitation changed to warm, heavy rains, and the temperature went...

Iild The Besti

7182 Rasmussen Ave. * Visalia, CA 93291 Where engineering and quality come first Our LM-470D is now redesigned to hold 15 ft, of antennae at 70 mph Tri-Ex builds the finest in crank-up, free-standing or guyed towers. CALL All towers are complete with Off IW IE rigid concrete base mount. FOR A FffEE

Super JPole Antenna

Here's a simple, inexpensive one-hour building project. Marty Gammel KA0NAN 1703 Hewitt Ave. West St Paul MN 55104-1128 A local swap net helped me land an old Kenwood TH-31AT in good working condition. OK. now I needed an omnidirectional gain anienna. 1 found very few published 220 anrenna projects in the ham magazines, and even fewer commercial gain antennas available. That was no problem, since Y c made man> J-poles over the last 14 years. The Super J-Pole has about...

The Next Generation

160-10 Meters PLUS 6 Meter Transceiver 1 All-Mode Operation (SSBtCW,AM,AFSKrFM) on air HF amateur bands and 6 meters JST-145, same as JST-245 but without 6 meters and built-in antenna tuner, 2 MOSFET POWER AMPLIFIER - Final PA utilizes RF MOSFETs 1o achieve low distortion and high durability Rated output is 10 to 150 watts on all bands including 6 meters, 3 AUTOMATIC ANTENNA TUNER Auto tuner included as standard equipment Tuner settings are automatically stored in memory for fast QSY 4 MULTIPLE...