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.
This 5-transistor receiver for the medium wave range was described in an article in Radio...
This circuit is from an American publication from 1978 and can currently be assembled with minor...
Although ECL logic is rare (no longer used), this circuit from a 1992 documentation shows how to...