I have a unusual one tube, kit radio that has (unreadable) Harkness Reflex written on its wooden base. Is anyone familiar with the circuit and if so, do you have a schematic?

Thanks,
Chuck Owens

Hi Chuck

Don't have a schematic for Harkness but can tell you about reflex circuits. This is a circuit where a tube is first used as RF amplifier than the signal is run back through as an audio amplifier. You should also have a crystal detector in your radio?

Check Crosley Trirdyn circuit. Has 3 tubes but uses the same principle.

http://www.nostalgiaair.org/PagesByModel/697/M0039697.pdf

Norm

:I have a unusual one tube, kit radio that has (unreadable) Harkness Reflex written on its wooden base. Is anyone familiar with the circuit and if so, do you have a schematic?
:
:Thanks,
:Chuck Owens