[ARC5] Silver refurbishment

[Dennis Monticelli]

I would like to reiterate that regardless of what chemical you use it's
important to not allow the dissolved silver to soak into the ceramic
substrate material, particularly if you're dealing with close-spaced wafer
switch contacts.  If that happens , rinse it out.  Alcohol is one way to do
it. Flooding the area with DeOxit D5 is another way.  If the part can be
removed you can use soap, a toothbrush and lots of water.

Bottom line is not to leave conductive paths.

Dennis AE6C

On Thu, Dec 24, 2020 at 7:07 AM Glenn Little WB4UIV <
glennmaillist at bellsouth.net> wrote:

> If anyone is interested, I have an interesting, but clearly off topic,
> story about silver sulfide and electronics.
>
> 73
> Glenn
> WB4UIV
>
> On 12/23/2020 10:58 PM, Richard Knoppow wrote:
> > The problem is that its not silver oxide, its silver sulfide, which is
> > a very poor conductor. There are various substances which will either
> > remove it but you will be removing some metal too. Any silver polish
> > will do the trick but its best to start with something mild.
> >
> > On 12/23/2020 6:12 PM, Brooke Clarke via ARC5 wrote:
> >> Hi Ken:
> >>
> >> It's my understanding that Silver oxide is an excellent conductor, so
> >> other than cleaning there's not much to do.
> >> --
> >> Have Fun,
> >>
> >> Brooke Clarke
> >> https://www.PRC68.com
> >> http://www.end2partygovernment.com/2012Issues.html
> >> axioms:
> >> 1. The extent to which you can fix or improve something will be
> >> limited by how well you understand how it works.
> >> 2. Everybody, with no exceptions, holds false beliefs.
> >> -------- Original Message --------
> >>> Dave Stinson at one time suggested using some product to clean and
> >>> refurbish the silver
> >>> coils in our transmitters.
> >>>
> >>> I believe he also mentioned refurbishing the silver on switch wafers
> >>> and contacts....or
> >>> someone here did anyway.
> >>>
> >>> So what did you use to remove the black oxididation from such
> >>> surfaces without damaging
> >>> them?
> >>>
> >>> I have to clean some old bandswitches which are oxidized. I will
> >>> have to use Q-tips and some
> >>> care to do this, but I need the "stuff" mentioned here.
> >>>
> >>> Ken W7EKB
> >>> ______________________________________________________________
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> >>
> >>
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>
> --
> -----------------------------------------------------------------------
> Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
> Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
> QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
> "It is not the class of license that the Amateur holds but the class
> of the Amateur that holds the license"
>
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