Full wave SCR dimmer (CB7201E)

Found in a 1967 RCA manual, this circuit uses components from the era that can be replaced by modern equivalents. The circuit is for resistive loads.

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500 mW push-pull amplifier (CB21795E)
This circuit was found in a Mullard transistor manual from 1960. Note the symmetrical power...
Speaker Remote Control (CB23765E)
With the shadow over the sensor, it is possible to interrupt the sound of your amplifier using this...
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This circuit puts the battery in the circuit when the voltage of a source is cut, preventing it...