[Boatanchors] Tarnish on APC Var. Caps.

[Jim Wiley]

FWIW -


Silver oxide, as found on the plates of APC  type miniature capacitors,  
need not be removed.  The conductivity of silver is not compromised by 
normal oxidation.  At least according to several publications.   Also, 
the silver is usually applied as a thin coat by means of 
electro-plating.  Excessive scrubbing runs the danger of removing the 
plating, which is obviously not someting a person wants to do.  
Finally., using tarnish removers runs the risk of some residue from the 
chemicals remaining in the moving joints of the parts in question.  That 
also is probably not a good  thing.


- Jim, KL7CC



Glen Zook wrote:
> I use Goddard's Silver Dip.  It is available in just
> about any supermarket.
>
> Glen, K9STH
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> --- Bill Stewart <bstewart at ipass.net> wrote:
>
>   
>> While the discussion is on cleaning copper, let me
>> ask about removing tarnish. 
>> I have a number of APC type var. caps. in the front
>> end of a superhet I'm rebuilding. The plates are
>> black with tarnish. Anyone know of a commercial or
>> homebrew solution I could dip them in to remove the
>> tarnish. I can't use a brush or do any rubbing and
>> also I don't want to loose the settings. I also
>> don't want to damage the porcelin/ceramic insulator
>> material. Any suggestions will be
>> appreciated...thanks, Bill K4JYS
>> _____________________________________
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> Glen, K9STH
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> Website:  http://k9sth.com
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