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Re: Large Plasma Globe Calculations
Original poster: "M G" <gt4awd@xxxxxxxxx>
If the calculations are correct, which is why I had originally
posted. Remember that I had only heard someone say a 6" plasma globe
"might" send out 4mm streamers in air off the discharge terminal. If
someone has a 6" plasma globe, and is willing to break the globe open
to find the actual discharge length in air, that would help. Another
thing to consider is it might actually take more power with such a
large globe. I would assume there could be differences that effect
the power requirements for such a larger gas filled sphere.
Matt G.
---------[ Received Mail Content ]----------
Subject : Re: Large Plasma Globe Calculations
Date : Tue, 01 May 2007 22:! 50:31 -0600
From : "Tesla list" <tesla@xxxxxxxxxx>
To : tesla@xxxxxxxxxx
Original poster: "Drake Schutt"
would a 9/60 coil really power i 125 dia sphere nobel gas filled
globe? wow i wouldve thought it would take more to ionize all of that gas....
On 4/30/07, Tesla list <tesla@xxxxxxxxxx> wrote:
Original poster: "resonance" <
resonance@xxxxxxxxxxxx>
You need an oven large enough to bake out the globe --- to remove all
the residuals. We also blast ours with argon at 50 kV for 2 hrs to
do the final removal after baking.
The oven large enough to bake a 125 ft dia sphere should only cost a
million $$$ or so. Our oven for up to 40 inch dia. globes, used,
cost us $9,500.00, and we got a "good deal" on it.
Dr. Resonance
>
;Hi everyone, just wondering if these calculations I made seem to be
>close to correct? I remember hearing someone say that a 6" plasma
>globe would probably send 4mm streamers in the air instead of the
>gas filled sphere. So if that is not correct then these calculations
>would be way off.
>
>
>
>Standard Six Inch Plasma Globe
>& Spark Gap Tesla Coil;
>
>Compare Chart
>
>************************
>S_IG = Spark In Gas
>S_IA = Spark In Air
>************************
>
>------------------------
>Six Inch Plasma Globe;
>
>( 76.20mm ) 3.00in S_IG
>
>( 04.00mm ) 0.16in S_IA
>------------------------
>
>************************
>76/4 = 19 (?)
>711.2 x 19 = 13,512.80
&g!
t;************************
>
>------------------------
>Medium/Small 9/30 SG Coil;
>
>( 13512.80mm ) 532.00in 44.30ft S_IG
>
>( 711.20mm ) 28.00in 2.30ft S_IA
>
>Sphere Diameter 88.60ft
>------------------------
>
>------------------------
>Medium Sized 9/60 SG Coil;
>
>( 19304.00mm ) 760.00in 63.30ft S_IG
>
>( 1016.00mm ) 40.00in 3.30ft S_IA
>
>Sphere Diameter 126.60ft
>------------------------
>
>------------------------
>Medium/Large 15/60 SG Coil;
>
>( 26790.00mm ) 1055.00in 87.90ft S_IG
>
>( 1410.00mm ) 51.50in 4.60ft S_IA
>
>Sphere Diameter 175.80ft
>-------------------------
>
>If the calculations are correct, that would ! be one amazingly huge
>Plasma Globe to see. Would it even b e possible to build one that
>large? I was thinking and the coil would need to be elevated to the
>exact center of the sphere to work correctly. I would think the
>primary would need to be heavily insulated if the coil was in the
>sphere. Something special for the spark gap would have to be thought
>up, or just use a VTTC, maybe. Of course a Glass sphere that large
>would cost thousands of dollars to make though, if not more. I doubt
>this is something any of us on the list could build.
>
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