The purpose of this circuit found in a 1967 GE SCR manual is to control a heating element. The SCR must have current according to the controlled load.
This circuit had its assembly described in a Radio Electronics from March 1963. The circuit uses 2...
We found this configuration in a documentation for radio amateurs from 1974. The circuit can be...
We found this circuit in an English documentation from 1989. The integrated circuit used is not...