Re: New spark record

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

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.