"I had an issue with an am tuner the adjustable potentiometers they were very hard to move but I was able to get the iron material cap unscrewed and found a lube on the underside of the cap so I took some of the lube under the cap and put some onto the treads of the iron cap then screwed the cap back on and now no more issues it moves freely now but, I was wondering if anyone knows the specific type lube used on these types of components etc. (non conductive perhaps silicon type lube not sure) the iron caps can very easily break when they get stuck etc. without the lube on the threads etc."
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"oh my mistake it's adjustable inductor, the substance I found a slight amount of that lube etc. under the iron material type cap was like a clear type of grease, silicon grease is slightly opaque so might not be silicon grease etc. also wasn't as viscous as silicon grease (26 year old part actually so I wasn't expecting to see it still there etc.)"
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"that's what it looked like but the specific type japanese part no information etc. the tuner has been in extreme heat and cold thru the 26 years etc. it is really durable stuff they used etc."
Yeah and I've a pot of Vaseline been in my garage for 30 odd years, still there, still usable.
Don't overthink it. In 26 years time you can apply some more.
Don't overthink it. In 26 years time you can apply some more.