|[AMRadio] Squeaky roller inductor|
mahlonhaunschild at cox.net
Sat Feb 3 12:31:29 EST 2007
Organic-based lubes like castor oil break down & gum up over time and
become impossible to remove. The conductive powders in greases and
anti-seizes (like copper, graphite, molybdenum disulfide) will
eventually find their way onto the ceramic drum, where they are liable
to form conductive tracks and also will be impossible to remove.
Use a high-quality heavy weight synthetic grease, SPARINGLY (e.g. the
size of the white tip of a match head) applied to the contact roller
shaft and also ONLY into the contact roller groove. Work it back &
forth a few times across the coil and you should be happy. Gun stores
should have what you are looking for.
Mahlon - K4OQ
>A.R.S. - W5AMI wrote:
>>I've got a rig that has a squeaky roller inductor in the tank circuit
>>and would love to quiet it down, not to mention have it turn a bit
>>smoother. Does anyone have any ideas on some sort of HV lubricant
>>that could be used in this part of the circuit without any sort of ill
>>effects? Without looking, I'm pretty sure there is no DC on the
>>inductor, but surely a lot of RF voltage with an 3cx1500 final.
>>I've been reluctant to try anything...
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