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Re: How much does aspect ratio of secondary really matter (is it all about K ...

Original poster: "J. Aaron Holmes" <jaholmes@xxxxxxxxxxxxxxxxxx>

Thanks, all who responded!  Yeah, I considered the
streamer length thing.  Here's the synopsis of the
coil as I see it now:

The coil's going to be about 150W.  My planned
secondary height is 24" with a diameter of 10".
Again, short and fat so as to be both physically small
and low-frequency.  About 1250 turns of #26 wire.
6"x22" dryer duct toroid.  Four turns on the primary
with a 342nF cap.  2400V PT for a power supply,
rectified.  Three "Fritz" SISG modules for a spark

Hope it works ;-)  I've got all my IGBTs now :-))


--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: FutureT@xxxxxxx
> In a message dated 5/31/06 6:26:29 PM Eastern
> Daylight Time,
> tesla@xxxxxxxxxx writes:
> >A lot of what's advocated as being *best* doesn't
> really
> >make a lot of difference in performance in general.
> >Generally what's important in coils is; power
> throughput,
> >proper toroid size, good spark gap, etc.
> >
> >John
> Aaron,
> I'm adding to my post here.  Certainly the coil
> whatever
> the aspect ratio has to be tall enough so you don't
> get
> breakdown from top to bottom of the secondary.  I
> was
> assuming that in my last posting, but I figure I
> should
> mention it.  One hears that streamers can reach
> about
> 3 or 4 times the secondary length as a maximum, and
> that is
> true it seems.  Depending on the breakrate and other
> factors,
> breakdown may occur with less streamer length.
> J