[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TCML] nst



Hi Bill,

I'm the person who told Doug drilling is not a good idea. I had two main reasons in my head when he approached me with this.
1) Will he drill in the right spot? Who knows how exact the core is 
placed. Easy to accidentally drill through a coil due to being a little 
off center.
2) By drilling, the shunts are shorted across for those shunts that have 
been drilled through, and likely, a little sideways due to core and case 
alignment as well as "blind" drilling.
Doug is thinking! How to increase the current on NST's without 
depotting. This is an excellent idea! But because of the placement of 
shunts in the core, trying to drill through the shunt to remove shunt 
material would be a very difficult task. Let's assume he drilled, hit 
the center of the shunt stack, and took out a 1/4" hole in the center of 
a 3/8" wide shunt stack. He may be fine there. He would have removed 
some material but he would not have been able to short all the 
laminations unless he went in sideways (very probable). It actually 
might work ok in some cases and certainly worthy of a try I think. I 
don't think it's possible to attain the performance as one can with 
shunt reduction during depotting, but it does give a risky alternative.
So Doug, if you have NST's growing out of your ears, then I say go for 
it and let us know what you learn from the experience. I don't know of 
anyone who has thought of or tried this. Your in "virgin territory" and 
that's a nice place to be with Tesla Coils and their components.
Take care,
Bart

William Noble wrote:
a siingle weld on the laminations is OK, but the use of laminations is only partly for ease of manufacture - it is more to get the magnetic properties of the core right and to manage circulating currents - if you just short out the laminations so there is a continuous path for current, you will in effect create a single turn secondary and it will rob efficiencly and cause heat - both of which you dn't want.> From: Gary.Lau@xxxxxx> To: tesla@xxxxxxxxxx> Date: Mon, 14 Jul 2008 19:06:15 +0000> Subject: RE: [TCML] nst> CC: > > I'm not sure that a short between laminations would be a problem. I've seen cores built where a welded bead held all of the laminations together. I would be more concerned that milling or drilling might just munge up the nice flat laminations into a mess.> > You lost me on the PVC part.> > Gary Lau> MA, USA> _______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla