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TOUCH_TONE_ENCODER_1

2014-11-08 09:15  
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TOUCH_TONE_ENCODER_1
Consists of SME Touch-Tone generator and keyboard made by Data Signal (Albany, GA) mounted on any small transistor radio. Only audio section is used, with output tones from loudspeaker being fed acoustically to microphone of FM amateur station. Article gives construction details,-D. In-gram, The Shirt Pocket Touch-Tone, 73 Magazine, Nov. 1976, p 58-59.