Re: [TCML] Tesla Coil with Mesh as Ground

[Matt Siri <mattisonsiri@xxxxxxxxx>]

one of those think-before-posting things eh... wow


________________________________
 From: Jim Lux <jimlux@xxxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx> 
Sent: Wednesday, February 29, 2012 8:12 AM
Subject: Re: [TCML] Tesla Coil with Mesh as Ground
 
On 2/28/12 8:13 PM, Matt Siri wrote:
> I'm not sure if surface area is as much a factor as mass.  More mass
> = more atoms that can take on more electrons and give electrons.

nope.. all about surface area.  To take a trivial example, a solid 
sphere and a hollow sphere of the same size can hold the exact same 
maximum charge and have the same capacitance.

Gauss's law and all that.


  I'd
> say it's a combination of both, but mass seems more immediately
> relevant.  I've run my maggie (1.6kW) at my school a few times now.
> The first couple of times, I used an old (and rather large) arbor
> press.  The last time (at a talent show), I threw a 3in*3in*~5ft
> steel bar that was laying around in the metal storeroom on a metal
> cart.  If you spread a bunch of chicken wire out, you're liable to
> have an arc pass from it to a conductor under the floor or somewhere
> else.

Not if the chicken wire is connected to the "cold" end of the secondary 
(RF ground point).  The arc won't go through.


  I once used a large steel cart as a ground; it sat on cement
> and where the wheels touched, large amounts of corona were visible.
> Be careful with isolated grounds, I accidentally touched the cart
> during the talent show; no one could tell but it didn't feel very
> good.  BTW, how long of arcs are you getting with 225VA?
>
> Matt Siri
>
>
> ________________________________ From: Cole
> Awesome-Jordan<jordancole@xxxxxxxxxxxxxxxxxxx> To: tesla@xxxxxxxxxx
> Sent: Tuesday, February 28, 2012 6:54 PM Subject: [TCML] Tesla Coil
> with Mesh as Ground
>
> I have to operate a tesla coil in a gym for a demonstration, how much
> chicken wire should i use for a proper ground?
>
> Coil is powered by 9000v 25ma NST, secondary is 3.5" by 18" and
> topload is about 37.5" off the ground.
>
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> _______________________________________________ Tesla mailing list
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>

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