Re: temperature to melt NST tar (fwd)

---------- Forwarded message ----------
Date: Sun, 18 Jan 1998 15:15:22 -0500
From: Kevin Wahila <wawa-at-spectra-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: temperature to melt NST tar (fwd)

>Once the tracks have formed this means that carbon has formed as well. 
>Melting and re-distributing the carbon is a bad idea especially in a
>transformer that is not really designed for Tesla duty service -- marginal
>at best.  Best to remove ALL of the tar and set the xmfr in a plastic
>tupperware dish and fill with xmfr or mineral oil (health food store). 
>This will provide superior insulation with the tar/carbon problems which
>will continue to plague you until you remove the source of the plague --
>the carbon that forms.  You can also carefully clean up the core/coil
>assembly before immersion with kerosine -- no flames nearby please -- and
>then give a final rubdown with denatured alcohol.  A standard oven will
>provide all the heat required for tar removal -- heat it slowly and for a
>longer period of time as opposed to trying to get it all out in 20 minutes.

I just finished heating my transformer and removing the tar from it earlier
today.  I did a quick hook up to test it and now it works agian!  I am
quite happy.  Anyway, there is still a thin coating of tar on the whole
thing.  I had some petroleum spirits and wiped away but not too much came
off.  I am thinking that letting it soak in a bucket of kerosine wouldn't
be a good idea.  Or, is that safe?  Before I make a case for it and fill it
with mineral oil, I'd like it to be as clean as possible.