This circuit was found in a 1967 Raytheon manual. The transistors are from the time. Equivalent modern transistors can be tried out.
This circuit, from 1988 documentation, allows the use of 15 to 60 W dimmed lamps without the need...
Loads up to 150 mA can be controlled with this circuit from a 1967 publication. PUTs can be...
This transistor source was found in a 1990 documentation. 2N3055 transistors must be equipped with...