This 6-transistor Japanese radio from the 1960s used germanium transistors and had an output power of 180 mW. The circuit is of the superheterodyne type with push-pull class B output.
Common operational amplifiers can be used on this circuit. The resistor with no value in series with...
The power of this germanium transistor audio output stage is a few tens of milliwatts. The circuit is...
This configuration is very traditional, appearing in several publications around the world. This...