Bob,

Kind of a guess, but in reading the service tech repair forums, I=20
discovered that  Deoxit D5 will degrade a carbon pot element.

You might want to try one of the lube products, such as Fader F5 or even=20
Fader lube.

http://store.caig.com/

Mark

On 10/07/2011 03:42 PM, Bob Blick wrote:
> I have a hobby project with a potentiometer in it that wears out
> regularly. I use cheap Alpha potentiometers from Radio Shack. Rated for
> 15000 cycles. The wiper wears through the carbon.
>
> Rather than using long-life potentiometers, which are slightly larger in
> diameter and will require grinding some space to fit, I'd like to first
> try greasing the wiper and wipee on a new potentiometer and see if it
> lasts longer.
>
> Any suggestions for grease? I have at my disposal:
>
> 1 Phonolube
> 2 Silicone plumber's grease
> 3 CV joint grease
> 4 Chassis grease
> 5 Moly brake pad grease
> 6 Brake caliper grease
> 7 Petroleum jelly
>
> I figured to fill the potentiometer with as much as possible. This
> potentiometer is used as a voltage divider with a high impedance load,
> so increased contact resistance isn't a factor. Operating temperature is
> under 100 F, so even the petroleum jelly should stay inside.
>
> Thanks,
>
> Bob
>

--=20
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