RE: Disassembling transformers

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>

Since it's current-limited, running an NST with the secondary shorted
won't draw any more power than its faceplate rating.  So I don't know
how that could result in melting of the tar.

I used an enclosed Weber BBQ grill to cook my NST and melt the whole
stinkin' mess - a process I hope I never have to repeat!  I used paint
thinner for the final dissolve.  If someone had poured that mess onto my
driveway, they would definitely be off my Christmas card list.

Regards, Gary Lau
MA, USA


> Original poster: "Dave Halliday" <dh@xxxxxxxxxxxxxx>
>
> Richard Quick suggested freezing but then running the transformer with
a
> short across the HV output for an hour or two.  This will warm the
core
> enough so that the chunks of frozen tar can be pulled away without
> damaging the windings.
>
> He used kerosene (a lot less dangerous) and mentioned that the
> tar-kerosene mixture was an excellent sealer for asphalt driveways if
> you have one.
>
> Dave
>
>  > -----Original Message-----
>  > From: Tesla list [mailto:tesla@xxxxxxxxxx]
>  > Sent: Thursday, February 09, 2006 9:13 PM
>  > To: tesla@xxxxxxxxxx
>  > Subject: RE: Disassembling transformers
>  >
>  >
>  > Original poster: "Robert Hanford" <pomnept@xxxxxxxxxxx>
>  >
>  > Hi,
>  > I froze my NST, chipped away some or the tar, then soaked it
>  > in gasoline til
>  > almost all the tar was gone. Don't remove all of the shunts.
>  > There is good
>  > internet material on this. I think a lot of us have stories about
this
>  > particular aspect of coiling.
>  > Good luck,
>  > Robert Hanford
>  >
>  > -----Original Message-----
>  > From: Tesla list [mailto:tesla@xxxxxxxxxx]
>  > Sent: Thursday, February 09, 2006 10:38 PM
>  > To: tesla@xxxxxxxxxx
>  > Subject: Disassembling transformers
>  >
>  > Original poster: norman@xxxxxxxxxxxxxxxxxxxxxxxxx
>  >
>  > Has anyone tried to open up an OBIT or NST and dissolve the
>  > potting material
>  > in
>  > order to remove the magnetic shunts?  If so, could you explain how.
>  >
>  >
>  >
>  >
>