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 also appears elsewhere on this site, obtained from other sources. This is an 80's...
This ttransistor test was found in a 1987 documentation. It is a simple oscillator that allows to...
In the circuit of the figure we used a potentiometer of 1 k ohm. We can use a larger...