Re: Toroid Design

• To: tesla-at-pupman-dot-com
• Subject: Re: Toroid Design
• From: Richard Hull <rhull-at-richmond.infi-dot-net> (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Tue, 22 Dec 1998 21:05:38 -0700
• Approved: twf-at-verinet-dot-com

Tesla List wrote:

> snip
>
> I am thinking about going to a 8" or maybe 10" x 50" toroid to replace the
> existing 5" x 40".  I would like comments on this.  I don't want to get
it so
> large that I can't break it out.
>
> The two existing toroids are made from 5" diameter corrugated black plastic
> drain pipe bent into a circle around a .25" thick acrylic disk.  It is then
> covered with clear packaging tape then aluminum foil tape.  Does this same
> pipe come in larger diameters like 8" or 10"?  I don't think the local
> building supply places carry anything larger than 5".  I don't want this
thing
> to be too heavy.  The coil can't support too much weight.  When I built
it, I
> thought a 4" x 14" toroid was large.  Pretty funny now.
>
> Ed Sonderman

Ed,

As we actually use coils we live and we learn.  It sounds like you have
learned.
Their are no equations for your situation.  I would build the size you note
above
and see if it functions.  Actually I like to have a system that breaks out at
about 75% then I can be assured of full control of spark.  You may already be
there.

Remember, you ideally would like to have a tad more reserve energy after
minimum
break out potential to feed the formed arc.  This often requires a bit more
sauce
up to the point of a second simultaneous arc forming.  This is how I have
done the
business since 1990.  It is key to achieving maximum spark to a grounded
target.

Richard Hull, TCBOR

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