02-01-2021, 02:46 AM
Philcos from that era don't use tone control pots, if it has a pot, with a cap going to B+, it's been modified. The model 66 was a modified version of a model 60, with a proper shortwave band, the tone control was only a two position switch. If I were going to put a tone control pot in anything I would use one of the many circuits where you are NOT shunting a capacitor between B+ and ground through a pot, the cap shorts out, and BBQ's the tone control pot.
Regards
Arran
Regards
Arran