This small commercial radio for the MW band with germanium transistors was found in Japanese documentation from the 1960s. The circuit is powered by a 9 V battery and has a 455 kHz IF.
With this circuit it is possible to excite direct current relays from an alternating signal,...
This circuit is from an old documentation. The integrated circuit can be replaced by a modern...
The FET can be a BF245, and the other transistors can be the BC548 and BC558 in this simple AM...