Ripple Filter (CB6724E)

This circuit was found in a Delco 1965 publication. Transistors may be current equivalents according to the desired output voltage and current.

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Reflex receiver (CB20557E)
This 1-transistor reflex receiver was found in a 1963 publication. The coil is for the mid wave...
Resistance to voltage converter (CB5092E)
We found this circuit in an American 80's documentation. The circuit can be adapted to function as a...
Triggered buzzer (CB8972E)
This circuit can be used as a shield as long as the power is supplied with voltage equal to that...