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 is from a 1965 Argentine publication (Radio Chassis Television). The original...
Using a 709 integrated circuit this circuit was found in the June 1972 issue of Radio Electronics...
This circuit was found in an old publication and can be adapted for use with modern...