[lasurveyor]

After having a look at the schematic it's not too bad. On the treble control if you ground the end that isn't grounded it should cut the highs out. If not there is a problem with C-201 (open) I suppose C-200 could be bad but kinda doubt it it's probably a mica. Do you have 132vdc at the top end of C-201??

Whoa, C-200 is one of the few caps that I didn't replace. C-201 is a new cap.

I see on the schematic that the plate voltage at C-201 should be 132v, I have 267 volts !! It's getting late and I'm getting that look from the wife that I'd better get away from the radio right now. In the meantime, thoughts?
Thanks,
Alan

So if the short the ungrounded terminal on the treble control to the chassis does the tone change??

No, no change grounded or not.