This circuit uses an 18 MHz crystal to generate 36 MHz signals. We found it in an 80's documentation. The circuit has an input for frequency modulation.
This circuit was found in Radio Electronics from May 1965. The SCRs and transistors are from that...
Found in a 70s RCA manual, this circuit uses transistors from the era. Equivalent types can be...
This circuit is placed between the instrument pickup and the amplifier input. The same version can...