This circuit is from a 1940 publication. It shows a typical battery-powered portable midwave tube receiver setup. The circuit is of the superheterodyne type that makes use of a loop antenna. The tubes are 1.5V wire types.

This circuit is from a 1940 publication. It shows a typical battery-powered portable midwave tube receiver setup. The circuit is of the superheterodyne type that makes use of a loop antenna. The tubes are 1.5V wire types.