This circuit for communications receivers was found in the January 1974 issue of Radio Electronics magazine. The transistors are Japanese types of the time, as the circuit was part of equipment of that origin.
The purpose of this circuit found in a 1967 GE SCR manual is to control a heating element. The SCR...
We found this circuit in an old documentation. The operational amplifier of the time can be...
This power control from a 1968 Motorola manual shows how to use a contemporary diac as a...