[Prev][Next][Index][Thread]
Re: scopes away - mosfet circuits
Tesla List wrote:
>
> >From MALCOLM-at-directorate.wnp.ac.nzSun Sep 22 22:33:56 1996
> Date: Mon, 23 Sep 1996 09:44:32 +1200
> From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
> To: tesla-at-pupman-dot-com
> Subject: Re: scopes away - mosfet circuits
>
> Hi all,
> In my present doom and gloom over primaries, Richards comment
> about cubic laws governing spark distance caught my eye:
>
> > I have always maintained that a doubling of input power by the
> > most advanced coil expert (beyond 10KW) will only yield >25% more
> > >spark. I further believe that even this ratio drops rapidly
> > above 40KW! I had anticipated an inverse square law to power /
> > spark length, the extra energy has to make extra voltage and extra
> > current. Inverse cube is bad news :-( but there's no arguement with
> > experience and a reasonable mechanism - ionised air.
>
> It seems from my primary musings that part of this might well be
> related to primary cap energy size. I've found that gap losses scale
> rapidly with Ecp. I wonder, has anyone compared an increase in power
> by upping Ecp with an increase in power by upping break rate? Does
> a difference exist? It seems that upping break rate if possible might
> be the more desirable option if it can be done.
>
> Malcolm
Malcolm,
This gap loss of which you speak is one reason I opt for the lower value
Ecp, higher break rates, and larger primaries since 1990. A sort of
kinder gentler Tesla coil. No need to beatup on the tank circuit.
Richard Hull, TCBOR