Hi,
I have a Harverson 10/14 amplifier from the 50s (I think) and it uses 4x 1M log potentiometers. One of them incorporates a DPST switch but, curiously, it's integrated with the treble tone control and, as I recently discovered, it's actually 25K instead of 1M which then explained why it didn't really do much as a treble control!
I'd like to replace the 25K unit with a 1M version, ideally with a switch (to avoid having to drill an additional hole) and solder lugs, but these seem impossible to source if you also need the potentiometer to be larger than the usual 16mm or 24mm units (to fit securely in the chassis' already-drilled mounting holes - the incumbent units are more like 30mm wide.
1. Does anyone know where I might source a 1M potentiometer, ideally with a DPST switch, that's around 30mm wide?
2. Would it be possible to use the 25K poteniometer as-is but with some additional circuitry to increase the effective maximum resistance up to 1M?
Any suggestions welcome
