This 8 W amplifier with germanium transistors was found in a Japanese documentation from 1967. The circuit is of the commercial type and is powered by two 12 V batteries or by a symmetrical source.
A fine adjustment of the output voltage of a power source is achieved with this circuit, which...
With this name, we found this electronic stethoscope with a coal microphone in a 1957 Raytheon...
This circuit can be used as a low Power audio booster for experimental projects such as radios,...