RE: Shorted turn?

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

Original poster: "Steve Greenfield by way of Terry Fritz <twftesla-at-qwest-dot-net>" <alienrelics-at-yahoo-dot-com>

It sounds like everyone who has tried gapping the
toroid has found the same thing, that the power lost
due to circulating currents in the toroid are
inconsequential.

Now: What are people doing to avoid circulating
currents in the guard ring? I mean that ring I
sometimes see just above the primary, grounded to
protect the primary windings from strikes. I don't
mean the secondary smaller toroid I often see on
larger coils just below the main toroid at the top of
the secondary.

If you can get arcs across a gap in a toroid where the
current is at it's lowest, I can see potentials for
problems in a guard ring located right above the
primary.

Steve Greenfield

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Hall, Dale by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <Dale.Hall-at-trw-dot-com>
> 
> Perhaps Terry could run his field line program with
> a shorted turn on top ?
> 
> I performed numerous tests years ago using
> AL dryer duct Toroids
>  (4", 6" & 8" minor dia toroids w/my 6.5D x 24"H
> Sec)
>  (it's easy to leave the junction gapped.
>  (I even created little arcs between the open torus
> ends)
>  (also did 1 turn additive & subtractive relative to
> the Sec winding direction)
> 
> There was no difference in power discharge length
> or likelihood of power arc using my DC single shot
> TC (~38" discharges).
> 
> Regards, Dale



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