This 6-transistor Japanese radio from the 1960s used germanium transistors and had an output power of 180mW. The circuit is of the superheterodyne type with push-pull class B output.
This circuit can be applied to other 3-terminal regulators and equivalent transistors can be used....
This circuit is from a 1990 publication, but the idea can be used in a current project to supply...
This simple circuit for headphones or small speakers was found in documentation from the 90s. The...