[ARC5] Cleaning pins...

[J. Forster]

The pitted look comes from the way the Tarn-X works:

Tarn-X complexes with the Silver Oxide or Sulphide, removing it, but any
area that is not contaminated is left untouched.

Silver is soft, so the creme or other polishes actually burnish the
surface as they polish.

Burnishing the ARC-5 contacts is pretty hard.

As I said, be sure you really need to clean the contacts.

-John

=================



> I used to use Tarn-X, but stopped when I noticed that it made the silver
> tarnish more rapidly.  I looked at a sample under a microscope and
> discovered that, contrary to the creams that are normally used for silver
> utensils, the dip stuff etches holes into the surface, sort of a honeycomb
> appearance.  That increases the surface area open to the atmosphere and
> accelerates the retarnishing...duh.  Pins would be tough to work on...lots
> of Q tips... but for things like the tuning coils on the ARC-5
> transmitters, the cream treatment will last far longer and doesn't damage
> the silver surface like a dip.
>
> -Mike
>
> On Oct 5, 2013, at 6:03 PM, "J. Forster" <jfor at quikus.com> wrote:
>
>> Dip silver cleaner, like Tarn-X, applied w/ a Q-Tip, followed by several
>> really good clean water rinses amd a long drying time.
>>
>> But, Silver Oxide is conductive, and you don't need to clean the pins.
>>
>> -John
>>
>> ========================
>>
>>> Good afternoon, folks.
>>>
>>> I got a very nice MD-7 a while back and just now getting to it.  A
>>> simple
>>> request:  suggestions for removing tarnish from the connectors.
>>>
>>> Thanks & 73,
>>> John
>>> K5ENQ
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>
>