5 to 200 seconds timer (CB21401E)

This circuit was found in a 1967 RCA documentation. The semiconductor components are from the time, and modern equivalents can be tried.

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One push button on off switch (CB7199E)
This circuit turns a lamp on and off with alternate touches of a switch. Modern Darlingtons can be used....
Photo relay (CB21912E)
This circuit with the CK722 was found in a Raytheon publication from the 60's. The relay is of the...
Three-phase power supply (CB23680E)
This circuit was found in Radio Electronics magazine from July 1960. The components used are...