02-01-2021, 01:44 PM
Yes, in sets like this the 3rd wire is capacitively coupled to the other wires in the line cord, and allows the house wiring to serve as an antenna. This wire is NOT connected at the plug end ! It is NOT a ground. A similar set up was used as an FM antenna by Philco in the 48-482 and some other sets, where a wire from a plug into the FM antenna jack went to a metal tab which wrapped around the line cord and served as an FM antenna. This set up actually works pretty well in areas which have fairly strong FM signals.
