26 Dec
2008
26 Dec
'08
9:36 p.m.
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From: cclist at sydex.com
To: cctalk at classiccmp.org
Date: Fri, 26 Dec 2008 20:21:46 -0800
Subject: RE: Tandy TRS-80 Model 4
Hi
It might be that one could restore it by removing a little of
the surface. One could try a small piece of 220 or finer sandpaper
and just remove a little of the surface that has been oxidized.
Dwight
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On Behalf Of Michael B. Brutman
The question now is about the conductive pad.
Cleaning with rubbing
alcohol has not helped anything. Is there anything besides pencil
graphite that will work to lower the resistance? I'm looking for
something that will last a while, and your concerns about the pencil
graphite have me concerned too. I'm not going to desolder and repair
every keyswitch so I won't be able to move dodgy ones to the keypad to
avoid using them. I'd rather take a little more time and find a better
solution ..
Here's a word you don't hear often - "Aquadag". That ought to do it.
GC also has some metallic ink emulsions.
Cheers,
Chuck