Dayton Atv Sessions

The Dayton Hamvention is now history April 29, 30, and May 1 will be embedded in the memories of many forever. Nearly 30,000 amateurs saw beautiful weather with weekend temperatures in the 70s and sunny skies a1 the world's largest hamfesL As usual, the Dayton Amateur Radio Club put on a fine show, maintained excellent crowd control, and provided much help to all. It was good to see so many hundreds of ATVers h to renew old acquaintances and make a few new ones. The USATVS Spec-Com...

Mbva Antenna Tuner

Push Button Antenna Switching 2 Power Meters, 300 ana 3.000 Watts For Orders and Price Checks Call 800- 523-7731 Indiana and information Amateur Radio in lTional Emergencies Awhile back Wayne devoted a bit of editorial space to lament the lack of amateur radio preparedness to deal with a major national emergency such as a nuclear war. Here are some thoughts on how to better prepare the ham community for emergency situations. Nuclcar weapons produce short but intense bursts of wideband...

Circle On Reader Service Card

P.O Box 1573 Stone Mountain, GA 30086 404-879-0241 Price 89.50 Photo A. The keyboard used for frequency entry on the Yeasu FT-980. Photo 8. The tCOM-761 s keypad is responsible for my interest in direct keyboard frequency entry. Frequency determination of transmitters and receivers are always a problem for the ham. In particular, the accuracy of tuning dials are always questionable. In the fifties, Collins radios had 1 kHz markings on the dial. That was accuracy II was also stale of the art,...

Antennas West

SunFtex, a lightweight, durable, and flexible Sovonics solar battery charger, is available from Hal-Tronix. SunFlex is equipped with blocking diodes to prevent dis-ch arge of the battery at night or on cloudy days. MA-2, the most compact generator, can be plugged into a cigarette fighter. MA-3 maintains boat or RV batteries. The MA-5 can power portable ra Periphex has a new battery pack for the Kenwood TR-2500 3500 and the TR-2600A 3600A. dios, MA-10 gives standby power for deep discharge...

Ace Systems

Ace Systems offers the battery-operated Opto Keyer with a built- in speaker, isolated output with no mechanical T R switching, reverse polarity protection, self-completing dots and dashes, LED status indicator for keying and battery. Price is 39.99 plus 3 shipping. Aft products are guaran teed for one year. Call or write for more information to Ace Systems, RD 1 Box 83, Wilcox PA 15870 814-965-5937, Or circle Reader Service number 203. COMMUNICATIONS ELECTRONICS SPECIALISTS, INC CES has a new...

Ege New England

S iem New Hampshire 03079 New England meiufl tii Toll Free 800 444 0047 STure Hour V-F 10-6 Sa 1 M Store Hour, MTliWF 10-5 Available-Send S1 Order Hours M-F 7 Sai 10-4 Gj associe store Lacom e Distributors Davis Jackson Roac P 0 Bo 293 Lacombe Louisiana 7044 amp P ione 504 882-5355 Now you can stay in touch oven when you're away from your radio. With aesiTs 2-meter FT-212RH arid 70-cm FT-712RH, an optional, internal digital voice recorder slrves as a convenient answering machine for you and...

Ege

Harry Electronics C-Comm Missouri Radia QuemenL Electronics Texas Towers Ham Slationi 1614 130th Ave N.E. Bellevue, WA. 98005 PEL 206 454-4524 FAX 206 453-5704 An introduction to the less expensive brothers of the IBM PC XT. The terms compatible and clone refer 10 computers functionally identical to IBM's PC and PC XT such computers can use the same hardware and software as the PC. This article hopes to explain a little bit about the extremely popular IBM Personal Computer compatibles, used...

Stone Mountain Engineering

Stone Mountain's KW-QSYer tor Kenwood rigs provides high speed keying and easy frequency selection. Its full-size keypad is inclined at a ten degree angle for comfort as well as speed. Popular with contesters and blind operators. The QSYer is a tiny computer terminal m an all-metal housing, measuring 3.1 x 3.5 x 2 inches. It has an internal speaker that sounds a different tone for each key. The KW-QSYer works with the TS-940 series with the Kenwood IF-10B interface , the TS-440 series with the...

With Repeater Controller

Sim plex samp I infl for i i xed s la ihon OpSFatlOft ' lair or full duplex operation for repeatci use Variable sample window and sample fate in simple ' Moblto acoess Via single- or multi- dlgir DTMF codes 1 Remottty programmable fuiK ions Includfl connect code, activity timers ond toll restrict fle ardless of your aulopalch requiem enl reliable, long erm service arrateuf Itted Supplies programmable logic for use 1 Fi rapentgr controller, including XMI7 hang time. TUT CW ID intervaf. gr gt d...

Helping Hand

Automatic control of rigs and antennas simplifies satellite operation While tuning through the transponder passband, itFs helpful to have an extra hand to work the rotators or keep the transmitter frequency locked to the receiver, during a low-orbit Fuii-OSCAR-12 pass. Automated satellite tracking was covered in the February 1987 Hamsats column here in 73. Since then, new options appeared as construction articles and products for sale from manufacturers. The May and June 1987 issues of QEX...

Oscilloscope Preamplifier

A little about op amps and video amps This article details the basic theory of operation of a video amplifier and the construction of a practical video amplifier project. I built this project to expand the sensitivity of an older oscilloscope. Before 1 begin a discussion on video amplifier theory ' a short review of operational amplifiers op amps is useful. An amplifier is an electronic circuit containing Bipolar Junction Transistor BJT and or Field Effect Transistor PET devices, These types of...

Info

Auto Range Voltmeter Circuit

r inHt. ii i i 1 iT XI 'i i Figure 3. Schematic of the auto-polarity voltage monitor, ponents Rl and R2, measure the actual value of the dual lOkO potentiometer, Most inexpensive varieties top out at less than lOkQ.In my case, 1 found H420Q the maximum value. I obtained several pots and chose ihe unit whose individual maximum values were most nearly equal. The closer the values, the belter the tracking of the two supplies. The rest of the process is a matter of follow ingdafa book formulas, w...

Bilal Company

I 37 MAnchester Dr Fh rlt int, CO808 6 rjf j 9 60 7-0650 Let DATAK be your designing partner, Use our dry transfer title sets to put that finishing touch to your custom project. Over 2200 htles plus alphabets and numbers insure that you II have the words you need. Switch markings and dial piate arcs are in a companion set, Use DATAKOAT spray for complete protection Sprays are not mailable 948 Blk 949 Wht 10 pt , 105,r Electronic Titles 24 sheets 12.50 9581 Blk 9591 Wht 12 pt 125rJ Electronic...