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 circuit was published in an article in Electronics Now magazine in October 1995. The circuit...
This circuit of very high input resistance was found in a Radio Shack documentation from 1977. The...
We found this circuit in an English publication from 1969. It shows how we can implement a bridge...