[TCML] Toroid Size
brandonhendershot at gmail.com
Sun Feb 19 17:26:28 MST 2012
Hi Futuret, Gary,
I remember the last time I ran my coil, I had at least a dozen stubby
streamers crawling around the topload. Although that could be due to the
crinkly Al Ducting... Remembering that, and what you've reminded me, that's
why I wanted a bigger toroid. I am aiming for the long 1-2 streamers. I
think that looks best. If I have to use a breakout point, I can live with
that. As far as proportions and aesthetics go, I think the 24" toroid will
compliment my 24" primary coil well, not too worried about that.
I also want a bit of over-compensation for when I decide to upgrade my
secondary to a 6" and my 15/30 to a 15/60.
Come to think of it, when I'm running a 6" secondary and a 15/60, would the
6"x24" toroid be too small? Especially hearing of your 7"x30" AND 4.5" x
15.5" on a 15/60, that's got me a bit scared... D:
On Sun, Feb 19, 2012 at 4:16 PM, Futuret <futuret at aol.com> wrote:
> Hi Brandon,
> Yes, it's definitely possible to have a toroid that's too big. If the
> is too big, sparks will only break out when using a breakout point or
> The proper size of toroid depends on how many sparks you want to
> see coming off the toroid. If the toroid is large enough to produce
> only one spark streamer... well then you'll get one streamer. If the
> toroid is smaller, then you'll get two streamers, and if smaller yet,
> then you'll get 3 streamers, etc. The smaller the toroid, the more
> streamers, but they'll be shorter.
> I happen to like the look when the streamers oscillate from side
> to side of the toroid and occasionally show 2 full streamers. This
> will give pretty long sparks and good spark action. To me this is
> the most exciting type of look. Some folks prefer a full head of
> streamers, etc.
> Low break rate coils probably need a little larger toroid to get just
> one streamer.
> On my TT-42 TC which gives 42" sparks using a robust 12/30 NST,
> I use a 4" x 13" spun toroid and I get about 3 simultaneous sparks
> I guess. I tested a 6" x 24" toroid on the coil and it gave a single
> streamer but needed a breakout bump to break out reliably.
> Clearly a 6" x 24" toroid was too large in my view. However the
> sparks were a little longer, about 44" or so. I didn't try a 5" x 16"
> toroid, but that would have been interesting to try. Folks often use
> a 5" x 16" spun toroid for a 15/60 NST powered coil. I used to offer
> a 5" x 16" size but it was just too time consuming to make.
> I do offer a 4" x 13" spun toroid ($165, free shipping in USA,
> as-spun finish). Amazing Science ( www.amazing1.com/toroids.htm )
> offers a 4.5" x 18" toroid for about $240 I think plus shipping. I have
> no connection with them.
> My website is:
> -----Original Message-----
> From: Brandon Hendershot <brandonhendershot at gmail.com>
> To: Tesla Coil Mailing List <tesla at pupman.com>
> Sent: Sun, Feb 19, 2012 5:55 pm
> Subject: [TCML] Toroid Size
> Hi List,
> It's been quite a while since I hung up coiling, looks like the bug's back
> So I finally got myself a job and some stable income (:D) and can finally
> afford to buy a spun aluminum toroid for my coil.
> First question; Can you have a toroid that's simply TOO big? I'm suspecting
> that my 4"x16" Al Ducting/Pie Pan do-dad is a bit too small. Would a 6"x24"
> Spun Al toroid be too big of a jump?
> I suppose it would be helpful to plug it into JavaTC, but It's not working
> on my browser right now, and I simply don't want to measure my up whole
> coil again (old PC died).
> Before I go through that errand, does anybody have any wisdom for me
> regarding using bigger toroids?
> You can see how my 4"x16" looks here: teslacoilers.blogspot.com
> Thanks Everyone,
> Brandon H.
> Tesla mailing list
> Tesla at pupman.com
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