[Elecraft] Re: Elecraft Digest, Vol 17, Issue 32

[JohnChanceRead at aol.com]

Bear in mind that many of the chassis screws are used to secure 'earthing  
joints'.  The use of a lubricating oil or copper slip will indeed reduce  
electolytic corrosion but may well also introduce some resistance, as all  
lubricating oils/greases will leave a thin skin even under pressure.   However 
'petroleum jelly' despite being a very good insulator has a lubrication  factor of 1 
and any pressure (via the screw threads) will break through the skin  and make 
good contact. It will of course also cover the joint and limit  corrosion. 
IMHO.
John G4BOU