Using a loop antenna, this 4-tube receiver with loudspeaker listening was found in a 1943 publication. It is a direct-amplified receiver with 3 tuned stages of RF. A simple circuit for receiving local stations.

Using a loop antenna, this 4-tube receiver with loudspeaker listening was found in a 1943 publication. It is a direct-amplified receiver with 3 tuned stages of RF. A simple circuit for receiving local stations.