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.