Re: Twin coil help?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "S & J Young by way of Terry Fritz <teslalist-at-qwest-dot-net>" <youngs-at-konnections-dot-net>


Adam,

Use any of the computer design tools, such as WinTesla, to design your twin
coils.   The two primaries are connected in series, thus their combined
inductance is twice that of a single coil.  Therefore, the primary cap needs
to be half the value the design tool gives for a single TC.  This being the
case, you ought to make your secondaries with 1,500 or more turns and use
fairly large toroids.  This will lower the resonant frequency, allowing you
to use a bigger primary cap and get a larger bang size (longer sparks).

Twins in theory are more efficient than a single TC.  For a given wall power
input, you should get longer sparks with a twin than with a single TC.  My 4
x 23 twins produce around 5 ft streamers between them with a bit more than
one KW of DC power going to them.  Twins are good in a limited space, such
as a basement, because you can control where the streamers go (between the
two toroids instead of roasting the ceiling).
--Steve Young


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, January 18, 2003 5:23 PM
Subject: Twin coil help?


 >
 > Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<Beans45601-at-aol-dot-com>
 >
 > I have been interested in building a twin coil system for a while now, but
 > I can't seem to find a good (keyword, good) website explaining what is
 > different for building a twin system instead of just one coil. I know they
 > have different primaries that are 180 degrees out of tune from each other
 > (not sure if I worded that right) and they have different secondaries.
But,
 > say that you were using a 12/120 NST to power them, what size cap would
you
 > need? Would it be the same for a regular coil?
 > Thanks
 > Adam
 >
 >
 >