Digitech PDS 1002 replacement input pot

[Otis R.]

I have a PDS 1002 in front of me that has an input pot with a broken shaft. The back of the pot says "E.C.I. Alpha C500K." So am I looking for a reverse log or a reverse audio replacement?

[MüThing]

You'd be looking for a reverse log potentiometer in this case; I'm not sure if reverse linear pots are even available but every result for C500K turns up anti-log rather than anti-lin.