73 Amateur Radio Today – March 1990
Issue Contents:
Give a Lift to Your ARC
– BACAR- Balloon Carrying Amateur Radio …… ZS6AKV 10
OSCARs in the Classroom
– Young students learn about space and amateur radio …… N8IWJ 11
Jamboree Radio
– WBSA K2BSA: Ham Scouts hit the BC bands …… WB4BNU 19
Time Division Multiplex
– More more-with-lessing …… W4TAL 20
Service Survey
– Get good service for ailing rigs …… WB6NOA 28
Phase III Hamsat Signal Reporting
– What does “S9” mean? …… W3LOY 40
Extending the Range of the Ramsey HR-4
– for less than $4 …… N8KDD 12
The UNI-8 Porta-power Adapter
– Power from a variety of sources …… W3AW 14
Ground Rules of RF Building
– Valuable guidelines for PC board RF circuitry …… WB4EHS 25
The Secret of the Accessory Plug
-Xcvr to PA-getting the right drive level …… W6YUY 36
The Dual-band “J” Antenna
– Outstanding mobile or base station antenna for 146 and 220 MHz …… W6YUY 48
Uniden HR-2600
– A beauty of a mobile rig! …… WA1R 32
Elenco M1900 Digital Multimeter
– Advanced features you can afford …… WB9RRT 38
Heil Ham Radio Handbook
– Abounding in good ideas …… N4RVE 44
73 Amateur Radio Today – March 1990
