Try a very light application of WD-40 (only - no penetrating oil) and use a toothpick to apply just enough to see it start to "wick" in. Then wait 24 hours. With the knob off, give the end of the shaft a LIGHT bap with a small hammer and then just crank on it with increasing force. It has corroded and it will take some force. If it breaks you really don't care because you are going to replace it anyway. :-)
Once it moves, try a bit more WD-40 and work it in. I have saved many this way. Bill -----Original Message----- From: Boatanchors [mailto:[email protected]] On Behalf Of Steve Mulder Sent: Sunday, September 24, 2017 8:53 PM To: boatanchors <[email protected]> Subject: [Boatanchors] frozen potentiometer 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
