RE: NST Shunt Removal (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 12 Jun 2007 20:17:42 -0400
From: "Lau, Gary" <Gary.Lau@xxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: RE: NST Shunt Removal (fwd)

It may just be me, but I think an oil-immersed NST is a mess waiting to happen.  Oil-filled containers, in particular plastic ones, simply WILL leak.  

When I unpotted my 15/60, I simply re-used the original metal case.  You'll not find a better fitting alternative.  Yes, it is not oil-tight.  So I filled it not with oil but melted Vaseline jelly.  After cooling and solidifying, it's leak-proof and spill-proof, and not a lick of trouble since.  

BTW, my 15/60 was a Jefferson, and its core construction does not lend itself to shunt removal.  

BBTW, the Vaseline jelly might melt somewhat if one were to operate a deshunted NST for many consecutive minutes.

Regards, Gary Lau
MA, USA

> From: otmaskin5@xxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: NST Shunt Removal (fwd)
> 
> Thanks everybody for the advice.  Sounds like heat is the only potential problem -
> which I gather can be managed with oil emersion & possibly tempurature
> monitoring.  I don't usually do very long runs anyhow - maybe a minute or minute
> and a half.Â
> 
> I'm going to find a suitable container for the depotted NST & then I'll have a good
> idea of how much transformer oil I would need.  I'll contact you, Dr R, to order
> some - thanks for your offer.Â
> 
> What does everybody usually use to contain an oil-immersed NST?  Tupperware
> type of stuff?  I assume a container slightly bigger than the NST would contain
> enough oil for sufficient cooling.
> 
> Thx again, Dennis Hopkinton MA