On Apr 11, 4:55 pm, "Nélio Abreu" wrote:
If it was a broken cable, lose connection or durty contacts, it didn't cause
the sound to decrease or increase it's volume, which it's what it happens.

Unless it is the circuit from the center-tap or wiper. This has every
aspect of a heat-related defect. You need to do a physical series of
tests then use a freeze-spray to test. But I doubt it is a capacitor.
And even if it is, that too would indicate by the freeze spray.

Heat-defects can be mechanical as well as electronic.

Peter Wieck
Wyncote, PA