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Re: Large Plasma Globe Calculations
Original poster: "M G" <gt4awd@xxxxxxxxx>
If it does not send any air streamers, and only corona glow, the
calculation could be lower than the correct value. Measuring the
streamer to ground length would probably be good enough. I noticed a
few people thought I planned on building a large plasma. This is not
the case. The reason I put this information on the list is I can't
build anything remotely close to the sizes in those calculations. Not
only do I not have the space, I don't have the funds to back such a
large project. Think of how awesome it would be to see a plasma globe
that large.
Matt G.
(PS; This might get on the list twice. Lycos is acting up today.)
---------[ Received Mail Content ]----------
Subject : Re: Large Plasma Globe Calculations
Date : Fri, 04 May 2007 17:19:27 -0600
From : "Tesla list" <tesla@xxxxxxxxxx>
To : tesla@xxxxxxxxxx
Original poster: "Scott Bogard"
Matt
One generally does not need to break the globe to get the HV lead out,
My 6 incher doesn't do much anything into pure air (unless you use a
grounded object to strike to, or it is really,really dark, then you
see corona). I have never measured the length of the arcs or corona,
maybe I will, out of curiosity's sake (I'm not sure how to do it
accurately though, but I'll think of somethin! g.)
Scott Bogard.
>From: "Tesla list"
>To: tesla@xxxxxxxxxx
>Subject: Re: Large Plasma Globe Calculations
>Date: Thu, 03 May 2007 22:49:54 -0600
>
>Original poster: "M G"
>
>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 ]----------
>
>Sub ject : Re: Large Plasma Globe Calculations
>
>Date : Tue, 01 May 2007 22:! 50:31 -0600
From : "Tesla list"
>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 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
>
&!
gt;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,
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>cost us $9,500.00, and we got a "good deal" on it.
>
>
>Dr. Resonance
>
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>
>>
>;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
>< br>
> >& 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 15/6! 0 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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