Potting material

[Ken Stone]

>I know, so many questions...
>
>What, specifically, might one use for potting small
>electronic assemblies?  Where does one get it?  I know
>that it's common to pot guitar pickups in wax, but I'm
>not sure that's very applicable here.  Seems like we're
>after some kind of polyurethane or varnish or something.
>Also, has anyone here any experience with rewinding power
>transformers?  What did you pot *them* with?
>
>Any suggestions or experiences to share?

I've seen both silicon base "sealant" type material and
casting resin used for potting circuit boards. There are
a few things to consider about the material -
- corrosiveness (some major electronic companies stuff this one up!)
- ease of pouring
- conductivity (insulating electroncially, conducting thermally)

Check with a resin supplier to see if they have a material commonly used 
by other companies for it.

As for repotting transformers, I had one done, and had it revarnished
by a company that made transformers. Whatever the material was, it required
baking to harden.

Ken
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                Ken Stone  sasami at blaze.net.au
                   ** Catgirl Paradise **
               <http://www.anime.net/~kens/>
         ** Australian Miniature Horses and ponies **
             <http://www.blaze.net.au/~sasami/>
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