[TCML] NST shunt removal vs more NSTs
davidnelson11 at bigpond.com
Tue Jun 10 19:47:05 MDT 2008
I have several NSTs the same. Is there an advantage to removing shunts as
opposed to just using more NSTs in parallel to increase current?
----- Original Message -----
From: "bartb" <bartb at classictesla.com>
To: "Tesla Coil Mailing List" <tesla at pupman.com>
Sent: Tuesday, June 10, 2008 10:30 AM
Subject: Re: [TCML] NST shunt removal
If the NST is in good working order, I would personally not modify it.
They are very easy to damage during the process. The only reason I
modified my NST is because I had killed it and at that point there was
no harm in going for it.
b alex pettit jr wrote:
> Hi Bart, et.al,
> So, from this, it seems that a full disassembly of the
> transformer ( coils from core ) must be performed to
> gain access to the shunt pieces ?
> I was hoping they would be more easily removed. I hate to potentially
> damage a fully functional NST.
> Alex P
> My NST was a Franceformer 12/60. I burned a secondary. Well, I heated and
> removed the tar from the NST. I then cleaned up the secondaries,
> primaries, core, etc.. When I put it back together, I decided to take 1/2
> the shunts out (exactly). The shunts were made of 4 bricks positioned
> around the NST core. I simply removed 1/2 of each brick (which were square
> laminations). I simply counted the total laminations in each brick and
> removed 1/2 of those. I expected at the time my current would double. I
> expected a 120mA NST. Guess what, I got a near 200mA NST out of the
> ordeal. Very surprising to me! The shunts are not linear to the current
> limit of the core. It is a differential increase in current, and as I
> realized that, it was that point that I decided to recommend no more that
> 1/2 the shunts removed from a depotting experience. Just a recommendation
> (if you feel compelled to remove more, by all means, have fun with it).
> About all I can say is that if you
> remove 1/2 the shunts out of a Franceformer 12/60, you'll do better than
> double the current. Take care,
> Tesla mailing list
> Tesla at www.pupman.com
More information about the Tesla