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STEREO_MULTIPLEXER

2017-01-02 09:43  
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STEREO_MULTIPLEXER
F-m retention is monaural when 19-kc multiplex input is absent or below acceptable power level. Rectification of 19-kc signal provides turn-on voltage to frequency doubler, for stereo.-S. Messin and T. E. Nawalinski, A Solid Stale Stereo Set Built in Modules, Electronics, 38:16, p 88-92.