[AMRadio] Squeaky roller inductor

Mahlon Haunschild 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...

More information about the AMRadio mailing list

This page last updated 14 Dec 2017.