73 Amateur Radio Today – January 1986
Issue Contents:
More Cheap Talk
– Here’s the beginning of the end of your sanity -a text-to-speech algorithm that lets your computer speak its mind! …… WB6NQK 12
Try an Inverted-psi Wire
– Get the DX edge on 80m with a radiation angle that’s almost too low! …… W1GV/4 22
Selcal and State Machines
– WA7NBF takes the mystery out of this powerful technique with a hands-on selective-calling project …… WA7NBF 28
Little or No Resistance
– Explore the strange world of superconduction where current flows forever and a picosecond is an eternity …… AJ0N 36
Run Silent Run Beep
– Is your FT-227RB scanning? You won’t have to guess with this easy add-on …… PY2AUC 40
A Better Money-maker
– WA6TTY stiffens up his original power supply to deliver a solid 13.8 volts at 20 Amps. The cost? Under three bucks! …… WA6TTY 42
The Commodore Cable Caper
– Need a printer cable? Strapped for cash? Don’t just sit there— build the darn thing! …… KE4PC 44
The Perfect RTTY Filter
– Its tunable shift covers 80 to 1160 Hz with a flat gain and Q. And you can build it for less than ten dollars !…… WA0MRG 46
Double Your Computing Power!
– Try “parallel processing” with a second CoCo keyboard …… NO8M 50
Working 2ICTU
– Can RTTY get any simpler? …… WB8QMK 54
73 Amateur Radio Today – January 1986
