73 Amateur Radio Today – August 1976
Issue Contents:
How Do You Use ICs?
– fundamentals …… WA2SUT/nNN0ZVB 24
Surprising Miniature Low Band Antenna
– the DDRR low noise antenna (part I) …… Boyer 28
MINI-mOS – The Best Keyer Yet?
– nothing Mickey Mouse about this one …… WA6EGY 38
The Skinflint’s Delight Breadboard
– cheap imitation of a commercial IC DIP board …… K7YGP/7 52
More PLL Magic
– like low frequencies for RTTY …… W9ZTK 56
The Logic Grabber
– selected interval logic tracer (S.I.L.T.) …… WA3TCO 60
Global Calculations for the DXer
– using a hand calculator …… W2IAT 68
Instant Counter Calibration
– using your TV set …… K9POX 70
Super Simple 450 MHz Rig
– go ATV with a $42.50 module …… WB4YTU/wA9GVK 72
The First Computer-controlled Ham Station
– Grand Prize winner at the WACC! …… WA8VNP 82
The Which Chip Dilemma!
– 4 8 12 or 16 bits: pros and cons …… Pittman 90
Meaningful Conversations with your Computer
– what those mysterious “languages” are all about …… WB2ZCF 98
A Baudot Monitor /editor System program
– listing for the 8080 …… Whipple W5CUD 102
A Logic Probe You Can Hear
– good not only for the blind …… WA6HWJ 106
How Computer Arithmetic Works
– do-it-your self experiments …… W1HCI 108
Satellite Orbit Predicting
– using a pocket calculator …… W1ODI 113
The Death of Negative (IBM) Logic
– some fundamentals of logic design …… W6KYP 116
And on the Other Side
– binary and octalization of decimals …… W3KBM 120
Build the Safari RTTY Terminal
– an active filter modem from Africa …… DL2SX/ZS6GG ZS6JR 122
Never Underestimate the NAND
– introducing the 7400 quad NAND gate …… WB0JHS 128
EI Cheapo Signal Tracer
– test gear for the cheapskate …… WB8EQQ 148
FSK with the SB-401
– simple way to get on RTTY …… WA3AJR 150
73 Amateur Radio Today – August 1976
