Re: No responses yet! Fw: Air core toroid...

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

Original poster: "mpf by way of Terry Fritz <twftesla-at-qwest-dot-net>" <the_machin_shin-at-hotmail-dot-com>

Think ((Variac) - (Core)).  That is actually what made me wonder... Why
construct a variac the hard way?  Is it just to make it easy to adjust the
tap, or do you gain some other features (higher inherent inductance ie less
core material, lower magnetizing current...) Shortest magnetic path must be
beneficial somehow... More so even than shortest electrical path (EI core
style transformer).

> Hi Matt,
>
> You might be right. I'm simply looking for a better "visual" of this idea.
For
> myself, this is a new concept and an interesting one. Thus, my interest in
> better
> visualizing Michaels concept.
>
> Take care,
> Bart Anderson
>
> Tesla list wrote:
>
> > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <Mddeming-at-aol-dot-com>
> >
> > Hi Bart, All!
> >         I see nothing in Michael's question that would lead us to assume
a
> > priori that the toroid in question is to be used as a Tesla secondary. I
have
> > not yet done the math or the experiment, but at first flush it seems
> > counterintuitive that a toroid, where the magnetic flux is completely
> > contained within the core, would have identical inductance to an open
> > solenoid, where the flux lines at the ends extend to infinity.
> >         FWIW a large "paena-toroidal"  or "quasi-toroidal" secondary
might
> > make an interesting bipolar Tesla coil. (reduced EMI?)
> >
> > Matt D.