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 simple teaching circuit uses 5 transistors in a monophonic organ version whose notes are...
We found this circuit in documentation from the 80s. The circuit is for cars with platinum. The...
This circuit for the medium wave range was published in Radio Electronics in February 1958. The...