Multipurpose temperature control (CB21368E)

This circuit was found in a 1967 RCA SCR manual. It uses period components that can be replaced with modern equivalents.

Distribution Amplifier (CB19012E)
This amplifier for distributing audio signals appears in other articles on this website and even...
MOSFET Parameter Meter (CB21398E)
This circuit was found in a 1964 MOSFET applications manual. The circuit uses period general...
Time Light (CB18745E)
This circuit works only with incandescent lamps, timing its activation at intervals that depend on C1....