[ARC5] roller inductors

[Richard Knoppow]

    Be careful of silver polish, it will remove some of the silver along 
with the oxidation.  The black stuff may be either silver oxide, which 
is a poor conductor, or silver sufide which is nearly as good a 
conductor as metallic silver.
    Carbon Tetrachloride was a standard degreaser until it was 
discovered how toxic it was. Its main advantage was being 
non-inflamible. Naphtha works as well  but one must have some care, it 
is essentially very purified gasoline. Also sold as Ronsonol lighter 
fluid but cheaper in the paint store. Its a good degreaser and does not 
leave a residue behind.  DeOxit is probably fine. Ive used it on the 
roller inductor in my MFJ Versatuner with good results.  I do not 
lubricate inductor, lubricant is seldom a good conductor.
     Most silver cleaners, rust removers, stain removers, use one or 
another of the "reducing" agents such as oxalic acid, phosphoric acid, a 
couple of others.  They may take too much metal off. I've used TarnX 
with fairly good results on edge connectors. Don't let it stay very long 
and rinse it off thoroughly with warm water. Works best on silver and 
copper.  I've had TarnX take the Nickel plating right off J-36 keys, 
there isn't much plating there and the silver plating on the rollers may 
be similar, so one must be careful of any of these products.

On 1/25/2016 2:48 PM, J Mcvey via ARC5 wrote:
> How about silver polish? They make 'silver wipes" now too. worked for 
> me...
>
>
> On Monday, January 25, 2016 5:46 PM, Robert Eleazer 
> <releazer at earthlink.net> wrote:
>
>
> Try lubing them with LPS-1.  It works great for scratchy volume controls.
> Wayne
> WB5WSV
>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL

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