Cleaning up an old plugboard

Alex Fraser beatnic at
Sun Nov 16 23:36:56 CST 2003

Try using a pencil eraser, it is slow but works.

hal wrote:

> 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.
> OK,
> (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 .........
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