Re: New spark record

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

Original poster: "Luc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ludev-at-videotron.ca>

Hi John

I know from the list and from your web site that you are a meticulous man,
could
you explain how you rig 4 mot  whiteout risking isolation breakdown. Do you use
isolation tx for each couple of mot and put it in seri.

Luc Benard

Tesla list wrote:

> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<FutureT-at-aol-dot-com>
>
> In a message dated 12/23/00 6:45:44 PM Eastern Standard Time,
> tesla-at-pupman-dot-com writes:
>
> Jason,
>
> That's an excellent result using just two MOT's.  I used 4 of them
> in series and only got 63" sparks, at 4kVA.
>
> To have the coil running on a 15amp 120 volt line along with the
> compressor too, and get 6.5 foot sparks, is truly amazing,
> especially with the MOT, small secondary and somewhat low
> voltage.  It shows that the 28awg wire can perform well even with
> longer sparks than my 42" TT-42 sparks.  Undoubtedly the large
> toroid is helping too.  My similarly sized secondary develops racing
> sparks when I reach 63" sparks or so at 120 bps.  This suggests to
> me that your coil is firing at a higher break rate, which makes the
> results all the more spectacular.  Are you saying that the coil
> produces 5 simultaneous streamers?
>
> Are you using a voltage doubler with the MOT's?  Do you have
> a website that shows the coil?
>
> John Freau
> --
>
> > Original poster: "Jason Johnson by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <
> > hvjjohnson13-at-hotmail-dot-com>
> >
> >  Last night I ran my rebuilt 4 inch coil, preparing it for showing everyone
> >  that'll be at my house tommorow for christmas celebrations. The basic coil
> > is
> >  unchanged electrically, but has a nice new primary and some mechanical
> >  improvements over the last coil. Its been a while since I posted my coils
> > specs
> >  so here they are again:
> >
> >  power supply: two series MOTs for 4800 volts
> >  capacitor: 110nf 18kvdc MMC
> >  spark gap: airblast gap with two 1/4" brass threaded rods, 2cfm -at- 35 psi
> or
> > so
> >  primary: 7" i.d. 1/4" tube w/ 1/4" spacing cable tie design
> >  secondary: 4 inch PVC wound for 23 3/4" w/ 28 guage magnet wire
> >  topload: 4"x17" al dryer duct with 8"x23" al dryer duct sitting directly
> on
> > top
> >
> >  Power input was from a 120 volt 15 amp circuit also with the air
> compreesor
> > on
> >  it. I ran it for around 30 min (not continuos) last night in the -5 degree
> >  weather. Longest sparks (about five of them) of the night were at least 6
> > feet long.