Re: Formula for calculating self resonant frequency of secondary coil or helical coil?

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

Original poster: "Jeremy Scott by way of Terry Fritz <teslalist-at-qwest-dot-net>" <supertux1-at-yahoo-dot-com>


I wrote a Perl module that will calculate just
about everything you ever wanted regarding tesla
coil setups. I might make it into a cgi.
(doesn't yet do cone type primaries, but it might...)

There is of course, always www.classictesla-dot-com
check the reference equations, they're fairly
accurate -- but there are different ways of
calculating some things. (Medhurst K -- related
to capacitance of a solenoid...)

--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: "Ed Phillips by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <evp-at-pacbell-dot-net>
 >
 > Tesla list wrote:
 >  >
 >  > Original poster: "Mercurus2000 by way of Terry
 > Fritz
 > <teslalist-at-qwest-dot-net>" <mercurus2000-at-cox-dot-net>
 >  >
 >  > Hello everyone, I was just curious, I know there
 > are programs out there
 >  > that calculate the self resonant frequency of a
 > secondary coil, like
 >  > wintesla etc. But does anyone know the actual
 > equation the programs use? I
 >  > would like to know so I would be able to find the
 > frequencies without
 >  > having to use a computer and the like
 >
 > 	Sure.  Most just use one of Wheeler's
 > approximations for inductance and
 > some form of Medhurst's approximation for self
 > capacitance; simple pen
 > and pencil or calculator job.  If you or any other
 > interested person can
 > read BASIC code I can sent you the text source file
 > for a BASIC program
 > that does exactly that.  Equations are obvious from
 > the listing.
 >
 > Ed
 >
 >