[ARC5] Silver refurbishment

[Richard Knoppow]

    Deoxit has been around for a long time and has a good record 
with RF. I would be more skeptical of the silver polish than of 
the Deoxit. I would use the Deoxit applied with a small brush. 
Also, while there have been reports of Deoxit causing Bakelite to 
swell I have not observed it. However, Bakelite is not a definite 
substance but rather a phenolic resin which is used as a binder 
with a filler. The filler varies from wood fiber to ground mica 
so the behavior varies with the filler. What will work with some 
fillers will not work with others. However, using a small brush 
allows close control of both the amount and location of the 
application.
    BTW, when did my leakage test I also tested with something 
else, acetone I think. The acetone (or whatever it was) caused a 
very considerable increase in the leakage, i.e. lowered the 
resistance and even after several weeks it didn't change.

On 12/24/2020 4:11 PM, Kenneth G. Gordon wrote:
> To clarify my issue here, I am dealing with the silver (plated?) bits of some phenolic
> bandswitch wafers which have all turned black....VERY black.
>
> If I decide to use Wright's Sliver Creme, then I have to wash with water, and as I remember
> it, phenolic absorbs water, so I will have to "cook" them (gently) after I have cleaned them.
>
> I DO have DeOxit, both the 5% solution and a very small bottle of the 100% solution, but I am
> reluctant to use it "around RF".
>
> I am going to use the Wright's and then dry the sections as  carefully as I can.
>
> Thanks for the discussion, folks. You all are very helpful.
>
> Ken W7EKB
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL