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?