Re: first non NST coil questions

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Drake Schutt" <drake89@xxxxxxxxx>

It is
Iv'e seen it in action ^_^

Drake Schutt

On 3/26/07, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
Original poster: "Gerry  Reynolds" 
<<mailto:gerryreynolds@xxxxxxxxxxxxx> gerryreynolds@xxxxxxxxxxxxx>

Hi David,

That must be quite a resister.  I^2R = 7000watts.  I must be missing something.

Gerry R

>Original poster: "David Rieben" <<mailto:drieben@xxxxxxxxxxxxxxx> 
drieben@xxxxxxxxxxxxxxx>
>
>Hi Scot,
>
>My rotary gap uses 3/8" diameter x 1.75 long solid tungsten flying
>electrodes and (2) 1/2" diameter x 3" long solid tungsten stationary
>electrodes, so that would probably explain why I can run more cur-
>rent before quenching begins to fail. However, even with my "beefy"
>electrodes, I still found that I needed to commutate the arc by series-
>ing the rotary gap with a forced-air cooled RQ style gap when I started
>pushing around 75 to 80 amps! I also needed to add a .7 ohm power
>resistor in series with my "humungus" 232 lb. inductive ballast, which
>would allow over 110 amps of current draw with the variac dial at 90!
>My rotary gap would start "popping" with the purplish-yellow "halo"
>around the blue-white plasma core and the output would start
>"missing" with the "pops". That's how I could tell that my quneching
>was beginning to fail. Even with the resistive ballast and the seriesed
>RQ gap, my rotary gap can only handle about a 90 to 100 amp draw
>before the quenching starts to fail and the tell-tale popping and missing
>begins. The added resistance helps to keep the current draw down
>to sane levels with the variac turned up to max.
>
>David
>
>
>----- Original Message -----
>From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
>To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx >
>Sent: Saturday, March 24, 2007 8:53 PM
>Subject: Re: first non NST coil questions
>
>
> > Original poster: BunnyKiller 
<<mailto:bunnikillr@xxxxxxx>bunnikillr@xxxxxxx >
> >
> > When I was running my BIGPIG coil on forced air gap, I began having
> > quenching problems at about 40 amps draw on a 240 line feed...ehhh
> > approximately 9.5 - 10 kVA. The gap was 2 @ 1/4" dia. tungsten
> > electrodes inside a 2" PVC pipe driven by my 1.5 HP shop vac...(
> > yupperz the industrial sized unit)  the arc would extend about 2"
> > beyond the electrodes. Once I started pushing the pig beyond 40 amps,
> > the streamers would get shorter and erratic in output. I switched
> > over to a rotory gap and still need something better....   the arc
> > will jump to the electrodes and follow them for about an inch pre,
> > during and post direct line up. Having it run like this extends my
> > active arc time quite a bit...  but Im getting 10 - 15 foot streamers
> > depending on weather moon phase if the tree is leafy or not...  :)
> >
> > Scot D
> >
> >
> >
> > Tesla list wrote:
> >
> > >Original poster: "David Rieben" 
<<mailto:drieben@xxxxxxxxxxxxxxx> drieben@xxxxxxxxxxxxxxx>
> > >
> > >Hi Justin, all,
> > >
> > >I'm not sure what the "magic number" is to where
> > >the power levels become too great for forced air
> > >cooling alone to adequately quench a spark gap.
> > >However, I do think that there comes a point to where
> > >it's more practical and economical to just upgrade to
> > >a quality rotary gap than to employ the draconian mea-
> > >sures that would be required to properly quench an
> > >air cooled stationary gap system. IIRC, Richard Hull
> > >used to state that anything over 3 kVA required a
> > >rotary gap but I think there are a few coilers that have
> > >built successful RQ style gaps running power levels
> > >up to 5 or 6 kVA. IMHO, with really large coils (>
> > >10 kVA) it is sometimes necessary to use a combi-
> > >nation of rotary and air cooled stationary gaps in series
> > >to help commutate the generated heat. That's what I do
> > >with my Green Monster that runs as high as 15 to 20
> > >kVA power levels and Cameron Prince also does this
> > >with his large coil.
> > >
> > ><http://www.teslauniverse.com/members/drieben/>http://www.teslau 
niverse.com/members/drieben/
> > > http://www.teslauniverse.com/gallery/v/coils/polepig/
> > >
> > >My $.02,
> > >David
> > >
> > >
> > >----- Original Message -----
> > >From: "Tesla list" < <mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> > >To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
> > >Sent: Thursday, March 22, 2007 10:05 PM
> > >Subject: Re: first non NST coil questions
> > >
> > >
> > > > Original poster: Justin 
<<mailto:rocketfuel@xxxxxxxxxxxxx>rocketfuel@xxxxxxxxxxxxx>
> > > >
> > > >
> > > > Hi Jared,
> > > >
> > > > What do you mean by high power levels?  A friend in town
> showed me > > > his
> > > > design which he claimed could withstand 5kVA pretty well.
> > > >
> > > >
> > > > Justin
> > > >
> > > >
> > > >  > Original poster: "Jared Dwarshuis" 
<<mailto:jdwarshuis@xxxxxxxxx> jdwarshuis@xxxxxxxxx>
> > > >  >
> > > >  > Hi: Justin
> > > >  >
> > > >  > It is nearly impossible to get high power levels to quench with a
> > >sucker
> > > >  > gap.
> > > >  >
> > > >  >
> > > >  > Sincerely: Jared Dwarshuis
> > > >  >
> > > >  > "If Tesla coils are outlawed, only outlaws will have Tesla coils"
> > > >  > "They will get my pole pig when they pry it from my cold dead
>fingers"
> > > >  >
> > > >  >
> > > >
> > >
> > >
> >
> >
> >
> >
>
>