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

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

Original poster: "Garry F. by way of Terry Fritz <twftesla-at-uswest-dot-net>" <garryfre-at-pacbell-dot-net>

> PATIENCE

Hmm, I seemed to have inadvertantly given the impression that I was
attacking the windings with the toothbrush as a weapon. ;-) No, I was not
trying to start a fire. I know I lack patience, but I think the problem was
not just a lack of patience but not knowing how patiently (Slowly) I should
proceed and the heating appears to make the paper brittle so pieces of it
suddenly flake off exposing bare wire and I couldn't see it due to the black
solvent.

Maybe this is a case for the freeze method.

>Mineral oil is a poor solvent. Use mineral spirits!

ACK!!! I must have mineral oil stuck on the brain. I was using mineral
spirits, not mineral oil.

>> It is said to split the case at the corners but the ones I tried to split
>> were double walled at the corner with a PFC in one corner that got hit
>> because I couldn't see it.

>Hey, that's your fault. They said split the case not >the entire corner.
Take
>your time and stay to the edge next time.

It was stuffed into the corner and touching the metal. There isn't much play
when the PFC is right next to the metal and I had to go about half an inch
from the corners to get past the double wall. I did try to separate the
double wall, but the chisel twisted and struck the PFC. Sure it's my fault
for not being more coordinated I guess. Sorry I was born a klutz and I am at
a disadvantage when trying to avoid hitting something I can't see ;-)

>He he he... that's what I first thought. It takes time, solvent, time, and
more time. I've had one TERRIBLE unpotting experience which led to all my
revisions of the process. If you put in a little thought you can find easy
ways to do the most dreadful tasks.

Yep, I figure after all this that there has got to be an easier way.


>Best of luck,


-Mike Novak

Thanks Mike.