This 1960s Japanese receiver uses 6 germanium transistors, being powered by a 6 V voltage obtained from large batteries. The circuit is for the medium wave range of the superheterodyne type.
The figure shows how to implement an audio power output for an operational stage. With the...
This control from a 1989 publication can be assembled with several equivalent components. The SCR,...
This power supply with several transistors can supply a current of several amps and a voltage of...