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
> > > > > _______________________________________________
> > > > > Tesla mailing list
> > > > > Tesla@xxxxxxxxxxxxxxxxxx
> > > > > https://www.pupman.com/mailman/listinfo/tesla
> > > > >
> > > > _______________________________________________
> > > > Tesla mailing list
> > > > Tesla@xxxxxxxxxxxxxxxxxx
> > > > https://www.pupman.com/mailman/listinfo/tesla
> > > >
> > > _______________________________________________
> > > Tesla mailing list
> > > Tesla@xxxxxxxxxxxxxxxxxx
> > > https://www.pupman.com/mailman/listinfo/tesla
> > >
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxxxxxxxxxx
> > https://www.pupman.com/mailman/listinfo/tesla
> >
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla