This small phonographic amplifier was found in a 1967 General Electric documentation. The integrated circuit is from that time, providing 1.5 W of output power.
This circuit was obtained from an old documentation, but as it uses still current components it can be...
This audio circuit has an output power of 1 W. We found it in the Radio Electronics magazine of...
This circuit that uses only discrete components (transistors) mimics the sound of an American...