This circuit uses two tubes and can be used as a domestic intercom. The circuit was found in an American Magazine published in 1950. The loudspeakers are used as microphones. The transformers and the choke are the critical components.
This circuit uses two tubes and can be used as a domestic intercom. The circuit was found in an American Magazine published in 1950. The loudspeakers are used as microphones. The transformers and the choke are the critical components.
