[Amps] Ham sells fine grit thing to clean contacts

[David Harmon]

Get a relay burnisher and forget paper....it can snag in the contacts and
can insulate them.


73

David Harmon
K6XYZ
Sperry, OK

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Charles H
Sent: Monday, August 17, 2015 12:10 AM
To: Tom Osborne <w7why at frontier.com>; amps at contesting.com; w5ifp at gvtc.com
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
> From: w7why at frontier.com
> To: amps at contesting.com
> 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 - w5ifp at gvtc.com
> >
> >
> 
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