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Re: [Amps] Ham sells fine grit thing to clean contacts

Subject: Re: [Amps] Ham sells fine grit thing to clean contacts
From: Pete N4KW <>
Date: Mon, 17 Aug 2015 10:13:45 -0400
List-post: <">>
Agree David, a "burnishing tool" is designed to clean various electrical contactors/relay contacts. I have a couple of them, and not sure, but would think that Grainger might carry them.
73, Pete N4KW

On 8/17/2015 1:19 AM, David Harmon wrote:
Get a relay burnisher and forget can snag in the contacts and
can insulate them.


David Harmon
Sperry, OK

-----Original Message-----
From: Amps [] On Behalf Of Charles H
Sent: Monday, August 17, 2015 12:10 AM
To: Tom Osborne <>;;
Subject: Re: [Amps] Ham sells fine grit thing to clean contacts

it will be a few weeks until I get whatever this man sells, but it is very
unlikely sandpaper coated with silica only.
"EmEry" Emery on paper for fine grinding is mostly aluminum oxide for
whatever good or ill that means.
A file makes me nervous due to the temptation to push too hard.

I have used white typing paper which works on very little
oxidation/corrosion but can be seen as a dark smear on the white paper which
tells you are getting something off the contacts.  Fully black silver
contacts usually will not come clean enuf with just paper.

I have not tried spray-on contact cleaners, sold by that naming, nor carbon
tetrachloride (yes I can buy that).   I have used commercial silver polish,
for tableware and granny's candelabra, on silver coax sockets and that works
good on medium tarnish but needs lots of rubbing and the really black
tarnish resists that polish about half good.

I am open to good suggestions.  Charly

Date: Sun, 16 Aug 2015 18:28:02 -0700
Subject: Re: [Amps] Ham sells fine grit thing to clean contacts

Someone told me once that strips of paper from a brown paper bag works
good for cleaning relay contacts.  73 Tom W7WHY

On 8/16/2015 6:13 PM, Jim Hargrave wrote:
Sandpaper is a no no on relay contacts. It leaves minute sand
particles imbedded in the contacts, especially silver plated ones.
Use a metal contact file or good grade of extra fine Emory cloth.

73, Jim -

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