This one-tube AC-DC receiver for listening to high-impedance headphones was found in a 1943 publication. Can be made with modern equivalent tubes. The tuned range depends on the coils. The circuit is of the regenerative type.

This one-tube AC-DC receiver for listening to high-impedance headphones was found in a 1943 publication. Can be made with modern equivalent tubes. The tuned range depends on the coils. The circuit is of the regenerative type.