I went to my local TV repair shop that has been in business since 1969 and they had and original extra VHF knob for it.
The one that was on the magnavox was worn inside and was just spinning. Total fluke !
If anyone needs vintage parts for thier sets, contact John at 416) 762-5751
American Electronics Service - 3058 Dundas St W. Toronto Canada
He said he has a warehouse full of vintage parts and radios and TV sets.
