Re: Question about capacitors for coil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Gerry,

At 01:16 AM 10/2/2006, you wrote:
> Hi DC,
>
> I've been thinking that the relationship of inductance to number of 
> turns squared has a lot of error in it for tall skinny coils.  I 
> believe the equation of:
>
> L = uo*N^2*Area / length
>
> assumes that the coupling from each turn on the solenoid is 100% 
> into all the other turns so that the total flux thru any one turn is 
> proportional to the number of turns.  For a very short and very fat 
> coil, I believe this relationship would be close.  For TC 
> secondaries with H/D ratio of say 5:1, there is a lot of error in 
> the number_of_turns squared relationship.  I bet the real exponent 
> is between 1 and 2 for typical TC geometries.  I might try to plot 
> this using JavaTC and see if there is an effective exponent given H/D.
>
> Gerry R.

You might want to check here first:

http://www.classictesla.com/sim/k.html

http://www.classictesla.com/sim/Rac_Q_Chart.gif

Some of this might have already been done.

Cheers,

        Terry