Using a double tube, one of the triodes in this 1943 receiver acts as a rectifier to obtain power from the mains. Listening is through headphones and the frequency range depends on the coils. The receiver is of the regenerative type.

Using a double tube, one of the triodes in this 1943 receiver acts as a rectifier to obtain power from the mains. Listening is through headphones and the frequency range depends on the coils. The receiver is of the regenerative type.