Steve, I just wonder if the shaft had been lubricated with silicone.
I once owned a new SB-303 receiver....Heathkit instructions said to lube the bearing and shaft with silicone. I think it was provided in the kit. IIRC, the shaft was aluminum on the main tuning dial and the bearing was brass. Well, one day I was tuning around the bands and the dial became harder and harder to move. It finally siezed up and was impossible to move the tuning knob!!! I figured I'd just lube it up some more, but it didn't do any good. No chemicals I had would free up the shaft. I had to take the bearing and shaft out and use considerable force to free it up. I was careful to not damage or bend anything, but WOW that shaft and bearing was really fused together!!! When I finally got it apart, the shaft, where it was in contact with the bearing, looked like a kind of flaky white color, IIRC. 73, Charlie, N0TT On Mon, 25 Sep 2017 13:47:56 -0700 Steve Mulder <[email protected]> writes: > Thanks for all the great suggestions! > > I have tried contact cleaner and WD-40, but no luck yet. The pot. is > > spring clipped to the back of a range switch, and the pot. shaft > runs > through the hollow shaft of the range switch. The pot. isn't stuck > on > the range switch shaft. I can't use a hammer until I remove the > potentiometer, because of the spring clip. Maybe things will start > to > move when the spring clip isn't pulling on the pot. shaft. I'll pick > up > some Blaster PB and go back at it tonight. > > btw, I have heard that Kroil might be better than Blaster PB, but I > can > only find Kroil online and I don't want to wait a week for it to > ship. > > Steve > > > On 9/24/2017 6:53 PM, Steve Mulder wrote: > > I'm looking for suggestions on how to deal with a frozen > > potentiometer. It's on the back of the vertical gain switch on an > Eico > > 435 scope. I tried contact cleaner and a bit of torque, but it > won't > > budge. What else could I try? > > > > Steve, KG7CCS > > > > _______________________________________________ > > Boatanchors mailing list > > [email protected] > > https://puck.nether.net/mailman/listinfo/boatanchors > > > > _______________________________________________ > Boatanchors mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/boatanchors > _______________________________________________ Boatanchors mailing list [email protected] https://puck.nether.net/mailman/listinfo/boatanchors
