Re: [TCML] TAR

[DC Cox <resonance@xxxxxxxxxxxx>]

Dolphs makes some potting insulations that may work for you.   3M also makes
some.

Dr. Resonance




On Sat, Jan 17, 2009 at 4:42 PM, Ed Phillips <evp@xxxxxxxxxxx> wrote:

>   Does anyone know where to get the type of black "tar" used to pot
> transformers?  Does anyone know the actual temperature at which it's poured
> into the transformers?  Did a web search but got nowhere and suspect that
> roofing tar or pitch probably isn't suitable.  I want to pot a couple of
> GMHEI transformers in a cylinder to simulate the secondary of a "spark coil"
> and don't want to mess with oil or the like.  Paraffin wax doesn't work, at
> least for me, because of too many bubbles - I've tried pretty hard to get
> rid of them [with the exception of vacuum] without much luck.
>
> Ed
>
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