This source was originally suggested by Delco in a 1969 documentation to power amplifiers up to 50 W. The transistors are of the time admitting modern equivalents.
Suggested by an American documentation for 1969 neon lamps, this circuit provides SCR control with...
This symmetrical source was obtained from Popular Electronics from February 1979. Transistor Q1...
The transistor may be any general purpose, but the integrated transistor is not common today....