This circuit is from an old documentation, making use of an operational of the time. The circuit can be adapted to use modern components. The power supply must be symmetrical.
This two-transistor MW radio was found in a publication from 1958. It uses one of the oldest type...
An application for the previous circuit (CB109) is shown here. The central frequency is determined by C and...
This circuit can be made usng the TIP32 transistor but must use carbon microphone (not very common these...