I have an '81 era Sunn Beta Lead that has a couple of potentiometers with broken shafts (and missing knobs). I've found the service manual images (Thank You ... ;o) and have determined that I need a 100k lin 'Level' pot #23-1110 and a 1M lin dual gang 'Drive' pot #23-1373. Does anybody have a source for these potentiometers? The 'Level' pot has a fourth leg to the pcb which I believe is just an addition contact point to provide mounting stability and a replacement Alpha or CTS shouldn't be too difficult. But the 1M dual gang 'Drive' pot needs to have a very small body diameter. After scouring Mousers online catalogue, I think the I've found an Alpha pot the might work. It's an Alpha p/n RV122F-20-15F-B1M (Mouser p/n 313-1250F-1M). Has anybody had any experience with these?
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