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Re: NST can't power Jacobs ladder!?
Should work.... A smooth curve at the bottom as it bends to the gradually
expanding part is important. If the gap at the bottom is very much smaller
(or more sharply curved) than the rest, the arc won't move up. I use 1/4"
copper tubing bent around a 2" form. If the radius of curvature at the
bottom is too high, the field will be concentrated there.
Try making the bottom look something like (only half shown... )
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> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: NST can't power Jacobs ladder!?
> Date: Wednesday, September 01, 1999 4:15 PM
>
> Original Poster: Jan Florian Wagner <jwagner-at-cc.hut.fi>
>
> Hi!
>
> Am I missing something here, or is it really that NSTs can't power a
> Jacobs ladder? Both of my 8kv 50ma NSTs rated 400VA did light an array of
> neon tubes really bright as I tested them. Couldn't measure any
> internal shorts and no "burn throughs" (at least not below 2000 MOhm)
> in either NST - they seem perfectly ok !?
>
> But the Jacobs ladder simply doesn't want to work. Just a dim, blueish
> arc, that stays where it started (~4mm). Electrodes are perfectly clean.
> NST centertap is grounded. The ladder did work nicely with a tiny TV
> flyback...
>
> I thought that at 50ma you should at least get some sort of small flame?
>
> Any ideas?
>
> --
> *************************************************
> Jan Florian Wagner
> jwagner-at-cc.hut.fi, petwag-at-kolumbus.fi
> http://www.dsh.edu.hel.fi
>
>