There are people selling vintage potentiometers, aren't there? On Mon, Nov 3, 2025 at 5:03 PM Wayne S via cctalk <[email protected]> wrote:
> Try cleaning it as Paul saysand se if that works. > > Carbon pots get a groove worn into them after time and the wiper ends up > making intermittent contact. > Usually you can take them apart and visually check. > It’s possible that just the wiper is worn. > Also possible the carbon element is cracked. > It all cases it’s just easier to replace the control. > > Sent from my iPhone > > > On Nov 2, 2025, at 11:48, Paul Koning via cctalk <[email protected]> > wrote: > > > > > > > >> On Nov 2, 2025, at 2:15 PM, Rob Jarratt via cctalk < > [email protected]> wrote: > >> > >> I have the contrast control on the monitor of my Olivetti M24 which has > >> become unreliable, you only need to touch it and the display will > disappear > >> completely. It doesn't look too hard to replace the rotary > potentiometer, > >> but I was wondering if there is any way to "repair" it to keep the > original > >> part. It looks like this: > >> > https://1drv.ms/i/c/fc758a5a91b91301/ESPGlbvW5wxGpXPC5kXfzVMBTUUW96GThzDMqZ_ > >> i8jq7tA?e=Ehmo1T > > > > I have a spray can of cleaner from Radio Shack that's designed to do > this. I used it a year or two ago to clean the pot on my toaster (the > toast darkness control). The can says it is "Tuner control cleaner & > lubricant, part number 64-4315. The ingredients list mentions > 1,1,1,2-tetrafluoroethane, cyclomethicone, and mineral oil. I suspect it's > considered non-PC nowadays, but I'm keeping it. > > > > It may be that turning the pot through its range a bunch of times will > rub off crud. > > > > paul > > >
