With two dual tubes, this mains-powered receiver performs like a 4-valve. The circuit is from 1944. Power comes directly from the power grid. The frequency range depends on the coils, in this case for medium waves.

With two dual tubes, this mains-powered receiver performs like a 4-valve. The circuit is from 1944. Power comes directly from the power grid. The frequency range depends on the coils, in this case for medium waves.