73 Amateur Radio Today – February 1983
Issue Contents:
Unleash the TS-900
– A rig like this deserves more room than 2meters can give. Get on HF (including WARC bands) with this transverter …… W4BF 10
Four-tone Audio Oscillator: A Potent Troubleshooter
– For any test that requires a tone this oscillator does the job It can also be computer-controlled …… W7BBX 20
Superman’s Repeater Control System
– This simple system offers four independent on/off outputs. Just duck into any phone booth to use it …… K3IJ 32
Up and Coming: Direct-broadcast Satellites
– The only thing not up in the air in this business is the satellites so this budding technology is not just pie in the sky …… N8RK 38
Work the Russian Robot Ops
– The robots aboard Russia’s two new satellites are cantankerous and challenging. Here are some tips on how to work them …… K4TWJ 44
Ham Radio Hits the ’82 World’s Fair
-when the gates In Knoxville opened would WA4KFS be ready? Here’s the inside story of the World’s Fair station …… N4AQI 50
Beef Up Your CB-to-cW Conversion
– A good bfo will bring your receiver performance up to par. This one is easy to add on …… W1BG 56
The Denali Connection
– Disaster struck these two hams in the back-country of Alaska. Only a tenuous radio link to civilization could save them …… KL7RD 60
Error Protection for Your Digital Transmissions
– Block coding can make your signal 100% error free …… W9JD/2 64
Drive-time SWLing
– This simple car radio converter will open up a whole new world of driving …… AG9C 70
Stop That Heist!
– What would you say about an alarm that’s portable inexpensive and goes off when a thief just touches the doorknob? We say build it …… WD5JWY 72
Get the DX Edge!
-there are ways to stand out in the pileups for Spanish-speaking stations. One is to speak their language …… KB9SP 76
Power-line Protection: The Weak Link
– Solld-state equipment may be extremely reliable but just microseconds of overvoltage can change that …… N8ADA 83
Higher Voltage Less Weight
– A voltage quadrupler that weighs ounces? You bet-and cheap surplus capacitors make it possible …… W7CSD 84
Make Room for More Agc
– Automatic gain control is useful In many applications. With this simple circuit you’ll never have to be without it …… N7APE 86
You Can Troubleshoot Mobile Noise
– K5CA tells what to do when a signal IS 5-7 and the noise is 5-9 …… K5CA 88
Electronics vs. Creepy Crawlers
– Build this ultrasonic oscillator and drive pests crazy. Your pet hamster too …… K7YZZ 90
Slimming and Trimming the R-1000
– In crowded conditions the 6-kHz filter may not cut the QRM. Here’s the way out …… 5Z4CL/k5PAW 92
Add a Touch of Class to CB Conversions
– Converting a Hy-gain board to 10 meters is only half the story Try addling a digital readout and scanning capability …… N2DS 94
73 Amateur Radio Today – February 1983
