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Re: Temperature to melt NST tar (fwd)
---------- Forwarded message ----------
Date: Thu, 15 Jan 1998 13:55:19 -0700
From: Bill Lemieux <gomez-at-netherworld-dot-com>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Temperature to melt NST tar (fwd)
Tesla List wrote:
> For what it's worth; I haven't seen it mentioned on the list, but
> some neon trannies use tar that is filled with a silica material
> according to an insert that came with a new Jefferson tranny.
The silica material (I'm not sure what it is either, exactly) is there
to assist in conducting heat from the transformer proper to the case-
something which the tar alone is not very good at.
This trick has been used by dry power transformer makers for years, I've
been surprised not to see it on NST's until recently.
On a side note, it's been my experience that FranceFormer brand has been
statistically the ruggedest and least likely to fail of any of the
brands I've used for various purposes over the years- anyone else care
to put in their $0.02 worth?
> This may explain why some tar melts well, and some always
> stays kind of firm.
I should think it _help_ melt the tar, but maybe I'm modelling it wrong
in my head. :-)
-Gomez
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