73 Amateur Radio Today – January 1986

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

Return to 73 Amateur Radio Today Index


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