Re: Potato Chips (fwd)

---------- Forwarded message ----------
Date: Mon, 27 Apr 1998 09:35:21 -0500
From: David Dean <deano-at-corridor-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Potato Chips (fwd)

-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Monday, April 27, 1998 12:07 AM
Subject: Potato Chips (fwd)

I don't know anything about transformer design, but over the years I
have modified a few. I believe that the shelac or varnish on the
laminations is there for electrical insulation. If you remove this
insulation, the laminations will be able to "communicate" with each
other electricaly. The result would be just like a single iron core, and
with AC the hysterisis will produce a lot of heat, not much usefull
work. Just my 0.02 maybe a transformer engineer will help with this.

>---------- Forwarded message ----------
>Date: Sun, 26 Apr 1998 05:08:25 -0700 (PDT)
>From: gweaver <gweaver-at-earthlink-dot-net>
>To: Tesla-at-pupman-dot-com
>Subject: Potato Chips
>The laminations on one of my unpotted neons is out of square.  The
thing is
>twisted looking and I don't like the way it looks so I took it all
>The laminations were stuck together with something like varnish or
>polyurethane.  I decided to sand blast the laminations to remove the
>varnish.  When the sand hit one side of the lamination it instantly
>up like a potato chip. The varnish came right off.  I turned the
>over and sand blasted the other side and the metal instantly curled up
>the other direction.  I tried to straighten it out by sand blasting
back and
>forth a little on each side but it won't straight up. I tired hammering
>but its still not flat.  I tried 3 more laminations and they did the
>thing.  There must be some type of stresses in the metal that cause
this to
>happen.  WARNING, don't sand blast transformer laminations. Acetone
>the glue stuff off of the lamination with no trouble at all.  Just let
>lamination soak about 15 minutes.  You don't even have to wipe them
>with a rag.
>Gary Weaver