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I was just reading on another forum about carbon resistors being made with organic binders. So not only can moisture soak into them and change the value, but I now wonder if certain oils could affect the binder in some way.

Eldorado just reported good long-term results, so I am not too concerned about the mineral oil, but the moisture part makes me wonder if cleaning it last time had an effect. Did you use water?

I saw in a cooling oil paper that dielectric oils are subjected to high heat under strong vacuum to remove moisture and dissolved gasses. Although not very practical on a home scale, I wonder if heating it at atmospheric pressure would remove some of that.

I guess I would put 100w into it at a duty cycle that flirts with its rating to see if driving moisture out of it helps. Bake it with RF

<blockquote data-quote="brandon7861" data-source="post: 855178" data-attributes="member: 53724">I was just reading on another forum about carbon resistors being made with organic binders.&nbsp; So not only can moisture soak into them and change the value, but I now wonder if certain oils could affect the binder in some way. Eldorado just reported good long-term results, so I am not too concerned about the mineral oil, but the moisture part makes me wonder if cleaning it last time had an effect.&nbsp; Did you use water?I saw in a cooling oil paper that dielectric oils are subjected to high heat under strong vacuum to remove moisture and dissolved gasses.&nbsp; Although not very practical on a home scale, I wonder if heating it at atmospheric pressure would remove some of that.I guess I would put 100w into it at a duty cycle that flirts with its rating to see if driving moisture out of it helps.&nbsp; Bake it with RF <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" /></blockquote>

[QUOTE="brandon7861, post: 855178, member: 53724"] I was just reading on another forum about carbon resistors being made with organic binders. So not only can moisture soak into them and change the value, but I now wonder if certain oils could affect the binder in some way. Eldorado just reported good long-term results, so I am not too concerned about the mineral oil, but the moisture part makes me wonder if cleaning it last time had an effect. Did you use water? I saw in a cooling oil paper that dielectric oils are subjected to high heat under strong vacuum to remove moisture and dissolved gasses. Although not very practical on a home scale, I wonder if heating it at atmospheric pressure would remove some of that. I guess I would put 100w into it at a duty cycle that flirts with its rating to see if driving moisture out of it helps. Bake it with RF :) [/QUOTE]

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