Sodion Non-Regerative Detector and 1 stage Amp.
This radio receiver used the Sodion S-13, a tube which did not oscillate.
The tube could only be used as a detector

DeForest Model BC-14 built in 1918




©1997 Rafael A. Perez (Ralph) WA4WW - CyberDroid - Fort Lauderdale, Florida. U.S.A.