Re: Help calculating L to match C

[Terry Fritz <twftesla-at-xxxxxxxxxx>]

Hi Seth,

The inductance you want is:

L = Xl / (2 x pi x Fo)

The equations for the inductance of various coils and spirals can be found at:

http://home.earthlink-dot-net/~electronxlc/formulas.html

The problem is finding Fo which is something I have spent a little time
working on myself :-))  You need to know the inductance of the secondary
coil which can be calculated with the formulas at the above site.  Then you
can punch the physical dimensions of your coils into E-Tesla6 which will
crunch the numbers and find your coil's Fo frequency.  E-Tesla6 is at:

http://hot-streamer-dot-com/TeslaCoils/Programs/Programs.htm

Be sure to leave room on the primary coil for fine tuning and adjustments
if you change to top terminal or something.  Having a primary too large is
a small problem compared to having it too small.  There are also a number
of programs that do the calculations.  However, it is best to do it by hand
in the beginning so you understand how those programs work.

Cheers,

	Terry


At 09:20 PM 11/28/2000 +1300, you wrote:
>I can't understand how to calculate the value of my primary coil with
>out knowing what the resonant frequency of my coil will be.
>
>Here is my design so far:
>
>15/60 NST
>50Hz supply
>LTR Cap=0.28uF MMC (2.2xresonantC)
>Xc=113636 Ohms
>
>Therefore Xl=113636 Ohms.
>What next?
>
>Any help greatly appreciated
>
>Seth Fischer
>