[LarryFS]

My 650X has a four position tone control.  Problem is that I can't detect much difference between the four positions.  The tone seems too biased towards bass.  Item 56 shown in the photo is a tone control box with two wires.  One wire (left most arrow) appears to connect to two contacts of the tone control switch.  Item 57 in the parts list is made up of three caps in the box (two .01 mfd and one 3000 mmfd).  Schematic and parts list are at http://www.nostalgiaair.org/pagesbymodel...013824.pdf.  When I recapped the radio, I didn't attempt to get into the box.  I'm guessing the old caps inside are preventing the tone control from working properly.  Does anyone have an easy way to gain access?  Why are these caps in this heavy duty box?  Shielding?  I have a dremel tool and some small thin grinding wheels if I need to cut the box open.

Thanks,
Larry