Thank you Dan.
On Jan 30, 2020 12:31 PM, "Daniel Kunkel" <dankunkel@xxxxxxxxx> wrote:
> Tedd,
> 1) With each gap you increase the ability to quench (good), however, you
> also increase voltage drop (bad). So there is a sweet spot.
> 2) Yes, they are in series, so all gaps must fire, otherwise it is a
> misfire.
>
> I haven't built a coil yet that uses both rotary and a series multiple gap,
> but from what I have read, you don't need to set the gap spacing like a
> normal single static gap (as in wider gap = higher voltage on the cap, and
> too much spacing = damaged components). In this setup, the voltage on the
> cap will be determined by the rotary speed/BPS, while the TCBOR/RQ gap will
> NOT be set to max out the overall breakdown voltage. You just need a few
> conservative gaps with fan to aid in quenching. A misfire would occur when
> the total gap spacing (rotary and multi gap combined) will not breakdown
> due to low voltage on the cap.
>
> ~Dan
> Kansas City area
>
>
>
> On Thu, Jan 30, 2020 at 10:37 AM Tedd Dillard <tedd.dillard@xxxxxxxxx>
> wrote:
>
> > 1 So more gaps are better than fewer gaps no matter what kind of gaps.
> > 2 If in a series of rotatary and static gaps, the static gaps missfire
> > doesn't that negate the timing benefit of the rotatary gap?
> >
> > On Jan 29, 2020 7:30 PM, "Daniel Kunkel" <dankunkel@xxxxxxxxx> wrote:
> >
> > > Tedd,
> > > A single static gap would not quench very well, at least without the
> aide
> > > of moving air, vacuum, magnets, etc. However, a MULTIPLE series gap
> does
> > > seem to perform quite well. Yes you loose a little power with each
> "hop",
> > > but in the end you gain due to faster quenching. Each break allows the
> > > power to be divided up and is easier to quench.
> > >
> > > A rotary gap is OK at quenching, but it only has two "hops" (as
> compared
> > > with a typical TCBOR or RQ style gap). Plus the speed of electricity is
> > > much faster than the mechanical dwell time of the electrodes in a
> rotary
> > > gap. So the rotational aspect of a rotary does not do anything for
> > > quenching. Plenty of folks have reported "following around" on a rotary
> > gap
> > > due to lack of quenching (there are videos on youtube as well).
> > >
> > > ~Dan
> > > Kansas city area
> > >
> > > On Wed, Jan 29, 2020 at 5:32 PM Tedd Dillard <tedd.dillard@xxxxxxxxx>
> > > wrote:
> > >
> > > > Why would a static gap quince better than a rotatary gap?
> > > >
> > > > On Jan 29, 2020 5:14 PM, "Gary Lau" <glau1024@xxxxxxxxx> wrote:
> > > >
> > > > > I have no experience with gaps for anything larger than an NST
> power
> > > > supply
> > > > > so can't comment on the series quench configuration. But based on
> my
> > > > > experience, I suspect the use of PVC in proximity to the gaps is a
> > less
> > > > > than ideal idea. Even using a single NST, the white PVC turns an
> > > > > unsightly brown color due to the intense UV emitted by the gap. I
> > > don't
> > > > > know how its insulating or mechanical strength might be affected,
> but
> > > > > better to use G10 if available.
> > > > >
> > > > > Regards, Gary Lau
> > > > > MA, USA
> > > > >
> > > > > On Wed, Jan 29, 2020 at 1:03 PM Daniel Kunkel <dankunkel@xxxxxxxxx
> >
> > > > wrote:
> > > > >
> > > > > > Hello Tesla List!
> > > > > > I am starting to work on my next spark gap for a 6-10 KVA
> > magnifier.
> > > It
> > > > > > seems the definitive spark gap design is that from Richard
> > Hull/TCBOR
> > > > > using
> > > > > > a rotary gap (to control timing only) combined with a multiple
> > break
> > > > > series
> > > > > > gap (to control quench only). Is there a better approach for gap
> > > design
> > > > > and
> > > > > > construction?
> > > > > >
> > > > > > Currently my plan is to use a 3.5 HP DC motor to spin a G10 disk
> > with
> > > > > > tungsten electrodes and combine it with the PVC + copper tubes +
> > fan
> > > > > series
> > > > > > gap.
> > > > > >
> > > > > > Thanks,
> > > > > > ~Dan
> > > > > > Kansas City area
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