Generally speaking NSTs that have GFCIs in them don't work for coiling as the GFCI gets triggered by the very act of coiling itself. However there are some NSTs in which it is easy to remove the GFCI circuit like some of those black-boxy ones from Franceformer and their cousins. They're in riveted steel cases and you can sometimes pop the top off by busting the rivets and get to the GFCI circuit which is in a little "compartment" sectioned off from the potting tar for the transformer itself. In the one's I've "modified" the GFCI circuit was actually just connected to the transformer primary leads with wirenuts. It was simple just to yank it out and connect the primary direct to the AC mains supply using the same wirenuts.
And then there are ones that are molded in one piece, and if you have one of those, forget it.
There's plenty of info on line about ways to "phase" NSTs. You can connect them in parallel and provided they're in phase the output currents add (net the usual losses). Don't connect them in series. That is not safe - think of what happens to those center taps, which are connected to the case. And remember, it's the current increase you're looking for and not voltage.
Also, on the issue of sound modulated coils - there's a wealth of experience right here on this list in the area of DR - solid state coils and modulating them. I will make the bold statement, and I don't think I'm wrong, that literally ALL of the sound modulated coils in the world today originated with designers and engineers and scientists who frequent this mailing list, or have been here in the past. While there is no one-stop location to find the master plans for the ultimate musical DR coil, outside of buying a pre-stocked/designed kit, there's plenty to go on by searching this list and the net. Seek and ye shall find.
It is a journey well worth taking. Because if you buy a kit, and detonate it, like most of us do with our first coils, you'll be left scratching your head and blaming the kit guy for your smoking wreck. Better to mess around a bit yourself first, blow up things in the privacy of your own garage where you can hide your most grievous transgressions before venturing out.
This summer I was away on a "picnic" of sort in the Nevada desert with some fellow coilers who remarked to me that he had never seen or heard of anyone destroy as much coiling paraphernalia as I claimed to have done on this very list before I finally got my coils stable and functioning.
All I can say is: he didn't know the half of it.The other thing I can say is: learn to use JavaTC. Math is your one true friend in a world of coiling legend, truth, and misinformation.
Cheers, Joe On 10/23/2012 12:25 AM, Greg Cousen wrote:
Thanks again, one small question, Is there a safe way to connect 2 NST,s that have the (GDFI) Circuit in series to get a higher output, the 2 NST Trannies are 240vac, centre tapped 15kv Greg :) -----Original Message----- From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Jim Lux Sent: Tuesday, 23 October 2012 9:02 AM To: tesla@xxxxxxxxxx Subject: Re: [TCML] RE: Sound Modulated tesla Coils On 10/22/12 11:30 AM, Greg Cousen wrote:Hi Mate, Thank you for your reply, I have looked on the net but have not seen any kits for the SSTCs, I have seen the rotary gap advertised as a kit, I will keep on looking, here in Aust our voltage is 230 / 240 @50hz, I will look into the variable frequency idea, thanks again :)Search for DRSSTC and modifiers.. http://www.drsstc.com/ has a bunch of links http://www.easternvoltageresearch.com/ - Dan McCauley's site http://www.stevehv.4hv.org/ - Steve Ward's site And, of course, you can ask on the TCML.. a total "turnkey" kit might not exist: you'll need to get various bits and pieces together. For instance, I think there's several people selling just the drive electronics, and it's up to you to get the power devices (because list price they're hideously expensive, but they turn up surplus fairly often at low prices). Or they assume you know how to go about winding a secondary and getting a toroidal topload. there are also folks who have done a design for themselves and posted the artwork and schematics, and it's up to you to get the board made and put it together.. _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
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