[rghines1]

Thanks for the schematic link.

The schematic shows a VC with a tap for better bass response at low volume. The "bottom tab" should be the tap terminal. The drawing seems to show the tap at around 400K for the 1Meg VC. Use an ohm meter to verify that the resistance is not abruptly changing from a break somewhere. Of course follow the drawing that the wiring is correct. Seems you may have followed someone's incorrect wire hookup from the past since the VC found in the radio did not have a tap. You will want to verify that R6, C6, and TC are wired too.

Richard