Re: coil design help

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

Original poster: Bart Anderson <classi6-at-classictesla-dot-com> 

Hi Steve,

I agree with David. At 480 bps, the 0.097uF LTR cap size would charge to 
41% of Vout (about 8.2kVp). The 0.024uF cap size would charge to 88% 
(17.9kVp). The trade off is cap volts and cap energy. At 480 bps, I think 
you end up with a difference in sparklength of about 4 inches (maybe). The 
smaller cap size will cost less.

The LTR cap sizes are in general for NST type transformers. The LTR sizing 
is setup for static gaps and SRSG's. The 0.097uF is for a static gap. The 
SRSG cap size would be 0.168uF which would really drop the cap voltage at 
the 480 bps rate.

Typically, pole transformers run STR (smaller than resonant).

Take care,
Bart

Tesla list wrote:

>Original poster: DRIEBEN-at-midsouth.rr-dot-com
>Steve,
>
>I'm not real good on the math, but I believe that your 14.4 kV pole pig
>wouldn't have time to fully charge a .097 uFD cap at around 480 bps. The
>.024 uFD would be a more practical size for such a high brake rate as this
>size would allow the transformer to more fully charge the cap between each
>discharge cycle. If you were running 120 bps sync, then I would tend more
>toward the .097 uFD size cap.
>
>David Rieben
>
>----- Original Message -----
>From: Tesla list <tesla-at-pupman-dot-com>
>Date: Thursday, January 15, 2004 7:12 am
>Subject: coil design help
>
> > Original poster: "steve" <steve_vance-at-cablelynx-dot-com>
> >
> > I have a question about designing a coil. I am planning on winding
> > a 6"
> > coil to replace my 4.5"
> > I am going to be running about 5KVA (14400V  350ma)
> > The question I have is: I am going to be using a ARSG at around
> > 480bps. Do
> > I design the coil to match
> > the actual capacitor I am going to use (.024uf) or the LTR cap
> > size for a
> > static gap(.097uf)?
> >
> > Thanks for any help
> > Steve Vance
> >
> >
> >