RE: Thoughts on spark length and the "Freau Equation"

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

Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>

Hi Mark

Setting the spark gap or its equivalent what is most important to the
charging behavior of a cap. In the entire design scheme of a tesla coil, 50
Hz or 60 Hz makes no essential difference. The UK has no advantage over the
US. However the line voltage in the UK is 240/480 (maybe), and this
translates into less current draw from the service mains. 

Godfrey Loudner



> -----Original Message-----
> From:	Tesla list [SMTP:tesla-at-pupman-dot-com]
> Sent:	Sunday, June 10, 2001 8:51 PM
> To:	tesla-at-pupman-dot-com
> Subject:	Re: Thoughts on spark length and the "Freau Equation"
> 
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <A123X-at-aol-dot-com>
> 
> I was kinda wondering if people running coils in the UK have a bit of an 
> advantage over coilers in the U.S. since each charging cycle is longer and
> 
> therefore allows for a bigger bang each time. Actually I'm pretty sure now
> 
> that they do, but how much better is what I'm wondering now. 
> 
> Mark 
> 
> In a message dated 6/10/01 8:16:28 PM Eastern Daylight Time,
> tesla-at-pupman-dot-com 
> writes: 
> 
> 
> >
> > Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" < 
> > jimlux-at-earthlink-dot-net> 
> >
> > I would assume that the equation proposed by John Freau for predicting
> max 
> > spark length  (=1.7 *sqrt(VA)) is based on 120 pulses per second.  That
> is, 
> > it's really more of  (length in inches)= 1.7 * sqrt(120 * energy per
> bang) = 
> > 18.6*sqrt(energy per bang in Joules). 
> >
> > Obviously, there are breakrate effects on spark length, but, for rates
> in 
> > the 100-200 bps range.... 
> >
> > Comments? 
> >
> >
> 
> 
> 
> 
>