73 Amateur Radio Today – May 1989
Issue Contents:
Decoding OSCAR Telemetry Part 1
– Decode any OSCAR beacon …… G3RUH 20
AMSAT Satellite Tracking Software
– Choose from a host of great tracking programs …… W5IU 38
Experimental OSCARS
– The story of the UoSAT program …… G0/k8KA 62
Space Education Network
– Bringing AO-13 into the classroom …… K9PVW and Barr 74
Radio Links to Phase III-d
– Making worldwide hamsat communication even more accessible …… DJ4ZC 77
The AMSAT-NA Microsats
– The new breed of miniature hamsats …… N5BF 83
Inexpensive Mode-l Dish Antenna
– Low-cost high-gain antenna …… WB5ZDP 18
Build A Simple Az-el For Mode L
– Have two Az rotors? Make an Az-el rotor! …… WA3ETD 24
Home-brew 435 MHz Crossed Yagi
– Budget beam for 70cm …… WB5ZDP and KG5OA 29
AANother Turnstile Antenna
– Enhance the downlink without enhancing terrestrial QRM …… ZL1AAN 32
Mode S Receive Techniques
– 13cm/23cm OSCAR work isn’t as hard as you think …… WA3ETD 36
Mode L My Way
– Save on expensive hard-line and microwave PAS …… WA8WBP 50
Polarizing/matching Selector
– Get in phase with any hamsat any time …… ZS6BTD 54
1269 MHz Helix System
– Take aim with this doubled-barreled array …… WA8WBP 71
Silicon Ephemeris Tracker
– The last word in satellite trackers …… WA5NOM 12
TS-790A
– Kenwood’s new tri-band OSCAR rig …… W3LOY 34
Automatic Antenna Tracking with SAT TRAK III
– For simplicity in sat tracking …… N5LCO 44
Ampire 146-oS Preamp
– Say good-by to preamp intermod problems …… WB3JZO 67
73 Amateur Radio Today – May 1989
