09-17-2021, 01:02 PM
Today I thoroughly checked out the original tone pot. Between the two end terminals there was ZERO conductivity ! Open ! Infinite ohms. And between the wiper and either terminal, no matter the position, there was also infinite ohms. I took the thing apart, just to see if thorough cleaning within would help, but no. There was continuity from the wiper terminal down to the wiper, but it was as if all the resistive material on the wiped surface was GONE, from either terminal to anywhere on the surface was infinite ohms. Even trying on the actual resistive surface from one point to another was infinite ohms. Very strange. I've never encountered a potentiometer which has failed in this way, this completely.
