Re: Coil Doesn't Fire

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

Original poster: "Bart Anderson" <tesla111-at-sbcglobal-dot-net> 

Hi Jim,

Hey, Robert is correct here. I thought the 0.0043uF value you gave was the 
total bank capacitance, but I see it was the individual cap value. Robert's 
concerns are real. Because your individual cap values are so low 
(0.0043uF), you'll be hard pressed to get a decent total capacitance as 
well as a decent voltage rating without adding several more caps. This is 
why we like to use higher value caps for MMC's. i.e., CD's 942's 0.15uF 
caps (which the Geek Group sells).

As it is now, the total bank is 0.0065uF and good for only 12kV (in other 
words, terrible). The caps will likely fail, soon. You need to re-think the 
cap design. There are a lot of cap programs to help with the task, although 
it's not difficult just to do the math on paper.

Here's what I use (of course):
http://www.classictesla-dot-com/java/javammc/javammc.html

Take care,
Bart B.

Tesla list wrote:

>Original poster: "robert heidlebaugh" <rheidlebaugh-at-desertgate-dot-com>
>Jim: Just looking at your data I see several problems.        1) your
>transformer is 15000 Vrms that is (1.414 x 15000=) about 22000 Vpk, and your
>capacitors are (1500 x 8=) or 12000 V . That is way to low a voltage.     2)
>your capacitance Total is ( o.0043 x 12 / 8=) o.00645 uf which is to low.
>3) your primary is only 14 turns. With a low capacitance your primary
>resonant frequency is probibly way to high and you are not reaching a tuning
>point. Add about 14 more turns of bare house wire to your primary coil for
>testing then if you reach a resonant point you can splice the primary to the
>correct number of turns.
>        Hope this helps
>               Robert   H