General purpose potentiometers
Alpha single pots in common values for valve amplifier builds
These are popular pots in popular values, made by Alpha. The pots’ body is 24mm in diameter, the shaft (for fitting the control knob) is 6mm and the pots use a 9.5mm mounting hole. All have a long nylon shaft that you cut down to size (see second photo, right).
All of these pots have solder lugs (not PCB pins). If you don’t need the anti-rotation lug (A) just bend it out of the way. Trim the shaft (B) to length with a junior hacksaw or Dremel-type tool