FM detector (CB20237E)

This circuit is based on an unusual component today. It demodulates a 10.7 MHz FI signal and was found in 1980s documentation.

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Guitar Amplifier (CB17061E)
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Circuit Breaker Outlet (CB16581E)
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Pulsating Buzzer (CB24716E)
Found in the September 1982 issue of Radio Electronics magazine, this circuit triggers a relay...