73 Amateur Radio Today – June 1988
Issue Contents:
Flip-flop/latch Circuit
– Welcome to digital electronics …… W4RNL 11
New York City School Program
– Carole Perry’s kids learning with radio …… WB2MGP 14
Digital X-Y Oscilloscope
– Handy tuning scope project …… WA9TYU 20
Care and Feeding of PBBS
– Etiquette and protocol for packeteers …… WA1FHB 22
UoSATs Part II
– Fascination and fun with these British birds …… N5AHD 29
Buyer Beware
– Sensible advice for buying second-hand gear …… WD8RCL 32
A Pulsed Bi-phase Communications System
– 19.2kB in less than a kilohertz! …… WA1FHB 34
Telegraph Trail Part IV
– Our final chapter …… W6CK 38
Briefly Speaking: RS-232
– The straight story on what it means …… W5PFG 40
Bicycle Mobile R&D Lab
– Small is beautiful …… N4RVE 42
Digital Voice Compression
– Let’s talk about it …… WA3YQY 51
Voltage Sampling with a Computer
– Practical A /d conversions …… Magee 54
Ramsey D-5100 Digital Auto-ranging Multimeter
– A top flight tool for the bench …… WB9RRT 18
ICOM IC-375A 220 MHz Multimode Transceiver
– A rig worth waiting for …… KT2B 26
73 Amateur Radio Today – June 1988
