Re: Power versus Spark Length

From: 	Greg Leyh[SMTP:lod-at-pacbell-dot-net]
Sent: 	Sunday, July 27, 1997 1:57 PM
To: 	Tesla List
Subject: 	Re: Power versus Spark Length


> To: Greg
> A larger inductance should require a longer charging or risetime thus di/dt
> would not remain constant for a larger inductor.  I believe Tesla referred
> to this as "mass" or total amount of wire in the secondary inductor or
> magnifier.  It would of course be possible to modify a design with a larger
> inductor to regain the previous di/dt of another comparable system.


In the following conversation segment, I was not saying that di/dt remains
constant, I was simply questioning the notion of Vs = Ls di/dt.  This equation
is true _only_ if the current is the same at all points along the secondary coil.

> >From:  Greg Leyh[SMTP:lod-at-pacbell-dot-net]
> >> From:  John H. Couture[SMTP:couturejh-at-worldnet.att-dot-net]
> >> >From:  Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
> >> >> From:  John H. Couture[SMTP:couturejh-at-worldnet.att-dot-net]
> >> >>
> >> >> 2. Increasing/decreasing the secondary coil inductance would
> >> >> increase/decrease the spark length.
> >> >
> >> >Why?
> >>
> >> Because of  Vs = Ls di/dt
> >
> >If you believe that di/dt remains constant while changing Ls, then
> >why not make Ls as large as possible?