This is a battery powered 3W power amplifier using germanium transistors. The circuit is from an English documentation from 1967. The transistors are from the time.
This circuit appeared in a Radio Electronics magazine in March 1962. The circuit uses two...
A complete test for opto-couplers can be made using the circuit Bellow. The function generator...
The integrated circuits of the SGS L79xx series are equivalent to those of the common 79xx series,...