73 Amateur Radio Today – August 1983 Issue
Issue Contents:
Construct This Customized Power Supply
– Whether you want 5 Amps or 30 this supply can give it to you. But you only pay for what you need …… W9ODK 8
VisiCode: The VIC 20 Way to Extra Class
– First you get random practice groups Then you get the answers …… W7LTH KA7AQA 14
Running Scared at Spratly
– Only steel nerves and luck stood between the 1979 DXpeditlon and disaster …… KB7NW 20
The COR of a Reliable Repeater
– Carrier-operated relays are the most-used circuits In any repeater. Use this simple design to get maintenance-free operation …… WA7SPR 24
Precision Speed Control for the Billboard Keyer
– Get more for your money by addling this circuit to last month’s project …… KD7S 26
PC Boards for Penny-pinchers
– Get picture-perfect circuit boards without buying a darkroom …… W2HCQ 30
Faultless SSTV Picture Preservation
– The dynamic duo of computer and printer helps save those perfect moments. Just add this program …… KF9X 38
Save Your Signal with Forward Error-correction
– In a hostile signal environment you need all the help you can get …… W9JD/2 44
A Colorado-style Battery Monitor
– Texas has its barbecue and Chicago its pizza. Colorado’s claim to fame is this near-perfect device …… Wilson 48
The Totally-modified 2000
– Take Azden’s popular 2-meter rig and add all the extras you ever wanted …… W1GV/4 50
Send Your TR-7800 to Obedience School
– This Kenwood rig has some interesting habits-such as a slow scan rate. Can you retrain it in one easy session? …… KE6VK 54
Do You Know Where Your Signal Goes?
– it doesn’t just sneak off your antenna and hide. Find out where your lobes are and what they look like with this simple procedure …… N4UH 56
Cheap Scanning for the IC-701
– Here’s a device that’s stingy in cost but generous in benefits …… AG9D 64
To Go Where No Ham Has Gone Before
– Sealand! -an enterprising team of DXers takes to the high seas to work S1 the smallest country In the world …… DF2AO 84
1001 Uses for the 9400
– Experiment WI-5 this cheap chip Ifs the IC you’ve always wanted with applications you’ve never dreamed of …… W3KBM 88
Propagation Explosion on 220
– This theoretical inquiry into the properties of 220 MHz yielded some unexpected results. Find out when and why your signal will be at its best …… W9MKE 90
18 kV with No Transformer
– You need high voltage but surplus transformers can’t turn the trick. Try this solid-state solution …… WA4WDL 94
73 Amateur Radio Today – August 1983 Issue
