THIS RADIO HAS BEEN SOLD!
|Second Edition. Published by Sylvania Electric, 1951. This 35 page paperback booklet has been prepared expressly for the electrical experimenter, electrical hobbyist. The book has many projects; among them are, Interval Timer, Polarity Reversal Alarm, Replacing Vacuum Tubes with Germanium Diodes, Electronic Metronome, A Radio Control System System For Model Trains.|
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