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.
This circuit is from an old publication of the 70's. It can be implemented with modern transistors like the...
This circuit is both simulation of the operation of a diode bridge and a test circuit for this...
This circuit allows you to simulate an analog telephone line for the repair and testing of...