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Re: Mutant Tar!!
Hi Brad,
I did this tar removing exactly with a hammer/screwdriver and
Tricloroetilene ... it takes a little but it works...
also you will mess with tar a little so don't forget to use gloves ;)
enjoy :)
ciao
Daniele
-----Original Message-----
From: Tesla List <tesla@pupman.com>
To: tesla@pupman.com <tesla@pupman.com>
Date: mercoledì 26 aprile 2000 10.46
Subject: Re: Mutant Tar!!
>Original Poster: FutureT@aol.com
>
>In a message dated 4/25/00 12:32:53 AM Pacific Daylight Time,
>tesla@pupman.com writes:
>
>> Original Poster: "Brad DiGiovine" <Guido28@mediaone.net>
>>
>> to all,
>>
>> i have had a NST sitting in gasoline for the past month unpotting and it
>> is still not all off. I can barely see the windings. Has anyone else
>> ever run into this? my 12kv30ma NST only took a week, and this 15kv30ma
>> is taking a lot longer. Are there better solvents for unpotting than
>> gasoline? thanks
>>
>> Brad DiGiovine
>>
>
>Brad,
>
>Generally folks remove the bulk of the tar first by using hand tools.
>One way to do this is to put the NST in the freezer overnight to make
>the tar brittle, then chip it off with a hammer and screwdriver. Another
>way is to heat the NST in an oven to soften the tar so it can be
>sloughed off easily. Another way is to hold a heat gun to the NST
>to soften the tar as you go along scraping the tar off. After most of
>the tar is removed, then it is soaked in the gasolene or kerosene.
>Don't combine heat and gasolene or kerosene techniques for obvious
>safety reasons. Be careful not to damage the coils when scraping off
>the tar.
>
>Another thing to keep in mind is that all tar is not the same. Jefferson
>brand NST's use a silica filler in the tar which makes it much harder to
>deal with.
>
>Some folks find the process too frustrating and wind up tossing the
>NST off a high cliff.
>
>Cheers,
>John Freau
>