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*To*: tesla@xxxxxxxxxx*Subject*: Re: [TCML] Toroid question*From*: futuret@xxxxxxx*Date*: Sat, 30 May 2009 21:25:22 -0400*Cc*:*Delivered-to*: teslaarchive@xxxxxxxxxx*Delivered-to*: tesla@xxxxxxxxxx*In-reply-to*: <20090530121241.8492B0ED@xxxxxxxxxxxxxxxxxxxxxxxx>*List-archive*: <http://www.pupman.com/pipermail/tesla>*List-help*: <mailto:tesla-request@www.pupman.com?subject=help>*List-id*: Tesla Coil Mailing List <tesla.www.pupman.com>*List-post*: <mailto:tesla@www.pupman.com>*List-subscribe*: <http://www.pupman.com/mailman/listinfo/tesla>, <mailto:tesla-request@www.pupman.com?subject=subscribe>*List-unsubscribe*: <http://www.pupman.com/mailman/listinfo/tesla>, <mailto:tesla-request@www.pupman.com?subject=unsubscribe>*References*: <20090530121241.8492B0ED@xxxxxxxxxxxxxxxxxxxxxxxx>*Reply-to*: Tesla Coil Mailing List <tesla@xxxxxxxxxx>*Sender*: tesla-bounces@xxxxxxxxxx

Dex, In my formula, I use the total power drawn from the mains. But the formula is only a rough guide anyway. Many folks use the formula in different ways for example they might use the input kVA instead of watts, etc. The formula still tends to work reasonably well and is

produce much shorter sparks. Small static gap coils with small tank caps often produce much shorter sparks than the formula would suggest. It's not true that I developed the formula based on SRSG, 120 PPS, equal bangs, although that is a popular myth. I actually based it on a variety of coils both 120 PPS and higher async break-rates such

have less trouble meeting the "prediction" given by the formula. Small

small coils seem to require 120 bps SRSG operation to fit the formula. Larger coils seem to get by well at higher breakrates at least up to some (unknown) PPS point. I don't have space to run large coils,

when analyzing the larger coils. Cheers, John -----Original Message----- From: Dex Dexter <dexterlabs@xxxxxxxxxxx> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx> Sent: Sat, 30 May 2009 3:12 pm Subject: Re: [TCML] Toroid question John,in your formula Spark lenght = 1.7*SQRT(P)

the mains?

equal bang sizes coils.

PPS coils. Dex --- futuret@xxxxxxx wrote: From: futuret@xxxxxxx To: tesla@xxxxxxxxxx Cc: Subject: Re: [TCML] Toroid question Date: Fri, 29 May 2009 18:18:23 -0400 Andrew, at my website, I show my TT-42 coil with a 4" x 13" spun toroid. The coil produces 42" sparks using a robust 12/30 NST. An ordinary 12/30 gives about 38" sparks. http://futuret.110mb.com Cheers, _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla

**References**:**Re: [TCML] Toroid question***From:*Dex Dexter

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