Features

A Pentium-Style Positive and Negative PS N4UAU Reading about new technology is great, but using it is even better or, wasn't this what attracted you to the hobby in the first place Meet the Marvelous MicroVert W4DXV 25 Home-Brew This Power Cube W2CQM First step in rebuilding your vintage RF deck. All right, let's see how you do with these. 43 In Search of a Simple Phone Patch - KD60RG 46 Get Kids Involved-and Keep 'Em That Way - WB2JKJ

Info

LM2825-5.0 buck-type regulator with I soldered the chip to a PC board, and added two optional capacitors, and hooked up my load. Twelve volts in, five volts out, and the chip doesn't even gel warm. My 7805-based power supply is now collecting dust. National claims awesome reliability 20,000,000 hours mean time between failure (which they note is 2,283 years). Remember when parts used to fail every few years The regulator is environmentally friendly since it is 80 efficient and thus...

Electrodes

Electrodes, and several recommended the use of silver as a safer alternative. Quite a few readers also sent me information from Dr. Robert O. Becker's book. The Body Electric, in which he cautions about hydrogen gas bubbles at even very tiny current levels. Since then, I've made sure that my Bioelectrifier devices had a symmetrical output waveform, and I use .999 fine silver for electrodes. Due to the very small current, there is probably 110 real danger, but it is a valid precaution, and as...

Model

Holds all Hanstick Antennas and many others Over 400 of holding power. 12 X 14 foot print. 3620-9A Whitehall Rd., Anderson, SC 29626 864-226-6990 FAX 864-225-4565 E-Mail hamstick hamstick.com www.hamstick.com ALL 100 MADE IN USA Add 7 per order S H Holds all Hanstick Antennas and many others Over 400 of holding power. 12 X 14 foot print. ow with no-rus all stainless steel hardware

Techno Trouble II

All right, let s see how you do with these. In the April issue, we introduced Techno-Trouble for Know-It-Alls. How did you do Here are fifty more semi-technical posers to further stretch that gray matter. 1. On 20 meters, an important attribute for any good receiver is noise figure. T F 2. Reducing your transmission line loss by 3 dB results in a 6 dB station performance improvement. T F 3. A well-optimized three-element vagi offers about 10 dBd gain. T F 4. The no ground radials required...

Udeteak

Switching Power Supplies In Your Hand MFJ s MightyLite switching power supplies are super-light and compact the MFJ-4225MV 25-amp weighs just over three and a half pounds, and the 45-amp version, MFJ-4245MV. weighs a mere five and a half pounds. That's a whopping eight times lighter than a comparable non-switching power supply These new switching power supplies feature a front-panel voltage control that lets you vary the output voltage from 9 to 15 VDC and gives a highly regulated output. You...

AC

Resistors are 390 k. 1 2 W. Diodes are I A, 000 PRV. Capacitors are 0.01 fjF 1000V. 3 A diodes it IN5408 are available at slightly higher prices. in the same direction. Before series-soldering one component in the string to another, a provision for mechanically linking each diode makes good sense. Small hooks can be formed in each of the shortened leads and crimped to secure the bond. If you prefer. only the crimp end cut from a solder lug may be used to make the bond prior...

Hamfest Every

Bill Clarke W2BLC 764 Alta-Voor Road Altamont NY 12009 One of the most enjoyable activities for hams is hamfests those gatherings where hams get a chance to look for used and new equipment, parts, and radio paraphernalia. Looking at all the old rigs for sale, some al bargain prices and others at well, you know slightly more than the price of gold. But suppose you live in an area where there aren't a lot of hamfests, or you can't easily attend a hamfest because of work- or health-related...

Yaesus VXR Micro Dualband HT

Pluses and minuses, big and little er, tiny. Michael Geier KB1UM c o 73 Magazine 70 Route 202 North Peterborough NH 03458 A few years go, Standard Radio Corporation shattered the HT size barrier with the C-108A and C-508A micro walkies. Being a lover of tiny gadgets, I bought a C-508A as soon as I could get my hands on one, vowing to let it go only if someone made a rig even smaller and or with more power output. Well, somebody has Yaesu s new VX-1R is a full-featured dual-band 2 m and 440 MHz...

Ork

73's ''Homing In columnist Joe Moell K0OV has been appointed the first Amateur Radio Direction Finding ARDF coordinator for the US. At its last meeting, the ARRL board of directors authorized creation of this volunteer position to promote international-style foxhunting activities, especially as a means to involve more youth in the hobby. The appointment was made by the League's executive secretary, Dave Sumner K1ZZ. ARDF coordinators have been appointed by the national societies of over 30...

Roamin Romania

Part I Timisoara, home of the revolution. George Pataki WB2AQC 84-47 Kendrick Place Jamaica NY 11432 In the fall of 1997, I decided to visit, probably for the last time, the city where I was born a long, long time ago. I wanted to meet my radio amateur friends and see how they w ere coping under the new socio-political system. almost a dccadc after a bloody revolution that freed them from dictatorship. I Hew with TAROM, the Romanian airline, the only nonstop flight from New York City to my home...

Circle On Reader Service Card

Spectrum Electronic Products introduces the world's first handheld repeater controller. No larger than most handheld radios, the HRC-10 converts a single or dual-band radio into a full featured simplex or duplex repeater system. Key featuresoftheHRC- 10 include voice IDer, DTMF Control and programming, hang and time-out timers, Digital Voice Operated Squelch DVOS , telemetry tones, and private voice mail http www.spectrum-usa.com 800-566-2788 - fax 408-336-9461 Spectrum Electronic Products...

Pc Electronics

Carole Perry WB2MGP Media Mentors Inc. P.O. Box 131646 Staten Island NY 10313-0006 What in the world does ham radio have to do with I he renowned composer George Gershwin We who have been in the hobby for a while know that the influence and fun of radio can easily permeate many aspects of our lives. So it really didn't seem far-fetched to me to recommend the use of radio operators to assist a friend who was producing the 100th Anniversary Salute to Gershwin at Brooklyn College in Brooklyn, New...

Microvert Antenna

Cpvc Antenna

Construction materials for the MicroVert antenna. in the tank circuit from escaping and interfering with my mother's soap operas. The lesson was learned and remembered. The MicroVert is simply the recreation of the tunable output circuit of that little 40-meter transmitter, enhanced in such a way that it radiates as much RF as possible. The MicroVert is, in fact, nothing more than a series-resonant circuit with a Q low enough to cover all of the 20-mcter band. Photo B. MicroVert parts...

Meet the Marvelous Micro Vert

Is this the world's smallest vertical antenna Well, I'll admit that the Micro Vert's claim to this title has not been well researched. There might be a smaller 20-meter vertical antenna out there, but 1 11 be very surprised if there is The MicroVert measures in at an astonishing 20 inches tall and yet manages to cover the entire 20-meter band with an SWR no higher than 1.5 1. Amazing Maybe. Interesting Absolutely Imagine the response you will get from other stations as you describe your...

Mfj

Measure signal strength over 60dB range - Check and set FM deviation - Measure antenna gain, beamwidth, front-to-back ratio, sidelobes, feedline loss in dB - Analyze audio quality with scope MFJ's revolutionary handheld 2 Meter FM Signal Analyzer lets you measure signal strength with over 60 dB dynamic range check and set FM deviation of your packet and voice radios measure antenna gain, beamwidth, front-to-back ratio, sidelobe suppression and actual feedline loss in dB. Plug in any scope and...

Michael Geier Kb1um

Super stable, drift free, not affected by temperature, metal or your body Frequency is set by a crystal in the 2 meter Ham band of 146.535 MHz, easily picked up on any scanner radio or 2 meter rig. Changing the crystal to put frequency anywhere in the 140 to 160 MHz range-crystals cost only five or six dollars. Sensitive electret condensor mike picks up whispers anywhere in a room and transmit up to 1 4 mile. Powered by 3 volt Lithium or pair of watch batteries which are included. Uses the...

Capacitor Side

Gray lines indicate areas with copper foil removed. A-D are wire jumpers to opposite side of board. Packs amp Charger for YAESU FT-50R 40R 10R FNB-40xh sfcm-NMH 7.2V 650mAh 41.95 FNB-47xh N.MH 7.2v 1800mAh 49.95 FNB-41xh 5wMMH 9.6v lOOOmAh 49.95 BC-601c Rapid Trickle Charger 54.95 FNB-38 pk 5W 9.6v 700mAh 39.95 BC-601b Rapid Trickle Charger 54.95 For YAESU FT-530 416 816 76 26 FNB-26 pack 7.2v 1200mAh 29.95 FNB-27S pk 5w 12.0V 800mAh 35.95 BC-601a Rapid Trickle...