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Re: [TCML] Re: Toroid



Oops,

Looks like the Freau formula is 1.7(square root wall plug watts),
not 1.1. Of course, John also states that this formula applies to a
"well designed" coil. So a 1100 VA input would "ideally" translate
to a 56" spark length output. Still, I wouldn't consider a 36" out-
put just "terrible" for a first attempt.

David

----- Original Message ----- From: "drieben" <drieben@xxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Cc: "David Rieben" <drieben@xxxxxxx>
Sent: Sunday, September 30, 2012 7:46 AM
Subject: Re: [TCML] Re: Toroid


Hi Christian,

As a matter of
fact, John came up with a rule of thumb formula for estimating
the spark length vs. power - square root of input VA x 1.1 =
the spark length, in inches, I believe. So with a 1600 VA input,
you're looking at about 44" of spark output, once the coil is
optimally tuned in. Of course, John's coil quite exceeded the
1.1X factor, but he was using a synch rotary with LTR primary
C, too.

Beyond that, you will simply need  more available power to
extend your spark length any more.

David


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