Tascam 22-2 output level control variable resistor 100k log or 10k logdual
From a scrapped 22-2 but I guess is the 22-4 and maybe some other models.
This is the output pot on the far right of the machine its a 100k Log dual pot but can be used independently rather than locked together.
Had some more come in with a 10k log dual
picture shows with nut but sometimes I only have the pot, though not normally an issue as your taking the old one out