Re: NST Shunt Removal (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 12 Jun 2007 20:26:00 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: NST Shunt Removal (fwd)

Hi Gary,

I've never dissected a Jefferson. How are the shunts not removable? Did 
they weld them in place? If so, could the weld be grinded off to free 
them? Weld grinding is one of those areas I've unfortunately had to deal 
with, but in every case, the weld can be ground away quickly.

Take care,
Bart

Tesla list wrote:

>---------- 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.?
>>
>>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.?
>>
>>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
>>    
>>
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