RE: More destroyed NST's How do I remove stubborn tar?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Gary.Lau-at-compaq-dot-com>

Mineral oil and mineral spirits are very different things.  Oil is a very
poor solvent as you have discovered.  Mineral spirits will dissolve the
asphalt, no problem.

Gary Lau
Waltham, MA USA

>Original poster: "Garry Freemyer by way of Terry Fritz
<twftesla-at-uswest-dot-net>" ><Garry-at-NDFC-dot-com>
> <snip> My own experience is FAR from anything like this. I spent SIX WEEKS
soaking
>a transformer in mineral oil. I consumed 7 gallons of the stuff and the NST
>still was so full of tar in the windings that immersing it in a fresh
gallon
>of solvent reminded me of the sight of an octopus spewing "Ink" all over
the
>place. The entire gallon was instantly black as night.