On Fri, 29 Sep 2000 11:24:12 GMT, you wrote:

>Dear all,
>
>I have a few circuits that are kept in water proof boxes, but while in
>storage (in not the most ideal place in the word) they seem to get damp.
>
>My question is not how to prevent this, as I have sealed the boxes as =
well
>as is humanly possible, and have put sachets of silica gel in the boxes
>also.
>
>My question is would a crystal or RC res circuit (in am currently using
>cheap resonator) startup more reliabily in these conditions?
>
>Has anyone come across this problem before?
>
>I know electronics should not be subjected to these environmments, but =
we
>all live in the real world don't we!
>
>Thanks for your valuble time and comments,
If anything, a _little_ leakage can actually help resonator startup,
but a lot would probably cause problems.=20
Leakage will always have some effect on the frequency of an RC osc,
but will probably not actually prevent operation unless R was high and
you have a lot of leakage across the cap.=20
If this is a major problem, conformal-coat the assembly.=20
Remember that moisture on a _powered_ board can cause rapid corrosion.

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