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