Found in old documentation, this receiver for the mid-wave range uses transistors from the era. In fact, modern general-purpose equivalents can be used.
We found this circuit in a 1968 Electronics World. It fires a buzzer if the ignition key is turned on...
Equivalent transistors can be used on this 80's circuit. Any general purpose PNP transistor can work...
This circuit is intended for carrying out experiments with solar cells. The circuit is from a 1991...