18 Jul
2010
18 Jul
'10
11:14 a.m.
On Sat, Jul 17, 2010 at 10:56:47PM -0400, Gene Heskett wrote:
Some lubricant obviously made its way in there, and
one would have to
assume that the switched current was sufficient to cause a microscopic
arcing, which will in time create a smoke film on the internals, which is
what you were measuring, and which caused the PSU to think the button was
pressed full time. Lubricants are a good idea only on a circuit that can
be called a dry circuit, where dry=microamp currents at very low voltages.
Ah, yes, these plastic things are often lubricated.
Washing it out with acetone was ok, but I would
probably have reached for a
can of paint thinning alcohol as it is less likely to degrade the plastics.
I know, but the acetone was all I had available...
Ciao,
--
Je veux que la mort me trouve plantant mes choux, mais
nonchalant d’elle, et encore plus de mon jardin imparfait.
(Michel de Montaigne)