12V x 10A power supply (CB21775E)

This power supply is from a 1977 documentation. The transformers have 11 V secondary with 10 A.

Sinusoidal to Square Converter (CB12820E)
This circuit, from a publication in the 1970s, uses transistors that no longer exist, but can be...
Lamp Switching by One Pair of Wires (CB4157E)
Indicated as a joke or challenge this circuit shows how it is possible to control two lamps using...
Triac LDR photo control (CB8327E)
Found in a 1960s RCA documentation, this circuit applies to most common triacs. The trigger device is a...