Cleaning up an old plugboard
beatnic at comcast.net
Sun Nov 16 23:36:56 CST 2003
Try using a pencil eraser, it is slow but works.
> Here's the problem:
> I am cleaning up a number of old plugs/sockets constructed as follows:
> two rows of 10 pins are mounted side by side on a bakelite rectangle
> form of about 10 inches. The
> pins are not commercial type but "specials" made from small brass
> hollow cylinder stock about 1/8 inch diameter and about an inch long.
> I'm sure this was done to save money over a more expensive
> industrial type plug. The equipment it comes from was put together
> back in the late 1950's and has
> accumulated a good deal of corrosion. Clean the pins is the problem.
> The pins appear to be plated brass corroded gray-white. This is some
> type of oxide introducing high resistance. The corrosion can be
> removed with a few light passes of 600 grit wet/dry sandpaper. The
> problem is that
> sanding takes the corrosion off and the plating with it.
> There are other sandpapers available, for example, 600 extra fine,
> 1000 and up. I'm told there are
> also chemicals available that will safely dissolve the corrosion.
> Dissolving the corrosion will leave the plating intact and avoid the
> scratching that is unavoidable with sanding.
> (1) Has anyone worked with this kind of chemical and remembers what it
> is called? (2) Where can I get some from?
> Thanks in advance. Hal.
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........ Alex Fraser N3DER .........
......... beatnic at comcast.net .......
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