Re: [TCML] lareg toroids for Tesla coils

["DC Cox" <resonance@xxxxxxxxxxxx>]

Thanks Arjan.  If you require an electrostatic field plot I have Maxwell 3D
which does it.  If you email me a complete drawing I could run the plot for
you.
It requires 12 hrs (all night) running on my 3.2 GHZ computer!

Happy holidays and thanks for the data.

D.C. Cox

On Thu, Dec 11, 2008 at 3:13 AM, Arjan van der Schee <vam@xxxxxxxxx> wrote:

> A bit late but here it is.
>
> The size of the toroid is 264*64 cm or 104*25 inches
> I used 12 hoops made from 4cm/1.6inch dia aluminium tubing.
> center to center spacing is 11.5cm/4.5inch
> edge to edge is 7.5cm/3 inches
>
> The streamers break out quite evenly from the 4 largest rings.
> I never did any electrostatic plots for this toroid cause i don't have a
> program for it.
> So i did it on gut feeling and some feel i got by playing with terry's
> program some years ago.
>
> I hope this helps
> Arjan.
>
> At 08:46 29-11-2008, you wrote:
> >I picked up a large dia tubing bender and plan on doing some 38 x 12, 48 x
> >16, and 120 x 30" size toroids next summer.  It will bend both 1" alum and
> >copper tube, and also 3/4" alum or copper.
> >
> >If anyone is building a large coil and needs inexpensive toroids, I will
> >extend an invitation to anyone to come up to Wis. Dells and "roll their
> own"
> >large dia toroids using the "ring method" of spaced finite elements.  I
> can
> >do the small inner hoops with our tig wirefeed aluminum welder and you
> just
> >roll the rings to fit.  We also have an excellent local supplier for the
> 3/4
> >and 1 inch size of aluminum pipe.
> >
> >We are presently using Maxwell 3D to determine the optimum electrostatic
> >plots to get the best spacing.  I plan on doing the large 120 x 30" size
> >using 1" OD alum tubing with a 2 inch spacing between each element.
> >
> >Perhaps Arjun or Greg Lehy might advise on the tubing dia and spacing they
> >found most efficient for their toroids.  I know Greg used stainless to
> >create his large 12 ft dia sphere and Arjun used aluminum tube to create
> his
> >finite element toroid.  I'm most curious on the tubing size and spacing
> they
> >both used.  Comments guys?
> >
> >Best regards,
> >
> >Dr. Resonance
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