This converter has coils according to the reception and converted frequency bands. We found it in the October 1989 Radio Electronics magazine in an article that teaches its construction.
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...
This tunnel diode circuit was found in American documentation from 1966. The tunnel diode is the...
This circuit provides two slightly different audio signal outputs from a monophonic audio signal, so...