[Amps] Ham sells fine grit thing to clean contacts

[George]

Charly and the group,
Using files/sandpaper/emery cloth/etc for contact cleaning is a bad idea 
for reasons already cited.  Alcohol with paper/business cards works for 
light cleaning.  If more vigorous cleaning is required I would suggest 
getting a contact burnisher.  These are available from electronic supply 
houses and eBay.
73, George
W2GS

On 8/17/2015 12:10 AM, Charles H wrote:
> 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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