>As a newbie to the list apologies if this topic has been covered before.
>
>For some years I've been modifying ex PC switch mode power supplies to give
>14v @ 20A for various rigs and amps. I do this by making a few component
>value changes and rewinding the secondary of the switching transformer. In
>order to do the rewind I have to remove most of the varnish from the
>transformer and to date have done this by soaking the entire transformer in
>mineral turps for a few days. This normally softens the varnish enough to
>scrape it off, separate the E cores and start the rewind process. However,
>my current batch of transformers don't seem to be effected by the mineral
>turps and I can't seem to find a suitable solvent to soften it. Any
>suggestions as to a suitable solvent.
>
** Newer magnet wire has a high-temp silicone-varnish coating. I
remove the insulation with a propane torch and steel wool, however,
paste-type paint-remover might be worth a try. Also, silicones are
generally vulnerable to petrol/gasoline fuel for automobiles. My guess
is that the solvent is benzene (C6, H6).
cheerz, Phil.
>---
>Outgoing mail is certified Virus Free.
>Checked by AVG anti-virus system (http://www.grisoft.com).
>Version: 6.0.561 / Virus Database: 353 - Release Date: 13/01/2004
>
>_______________________________________________
>Amps mailing list
>Amps@contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|