This FM receiver tuning step circuit was found in a 1960 documentation. No information about the coils is given, but the FI used at the time was 10.8 MHz.
Found in a 1969s American documentation, this circuit uses transistors from that time. The...
We found this circuit in a Radio Electronics magazine from January 1975. The transistors are...
This low-current control circuit has a lamp as a load, but can have other types of devices, such...