At 05:30 PM 8/11/2010 Wednesday, Mike \"Rocket J Squirrel\" wrote: >I opened it once before, a few years ago, to move the wiper to a fresh >bit of track. I'll open it again to clean the track. > >Is the pencil eraser trick good enough, or would it benefit to use some >kinda cleaner? I'd be very reluctant to use any sort of mechanical cleaning on that. More than reluctant; I flat wouldn't do it. It's not like a metal contact that can get dirty or corrode; it's more like a pencil drawing. I've used RS-type spray circuit cleaner on it with at least slight improvement. If you haven't done the capacitor fix, do it. It will make up for a good deal of AFM tiredness. And stick a few volts across it (cable unplugged, of course) and hook your scope to the wiper and either end. Exercise the vane slowly and look for dropouts. Yours, d |
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