RE: [TCML] Alternate RF Ground

["Phil Tuck" <phil@xxxxxxxxxxx>]

Kurt,
I ask only out of interest, as the chances of me getting away with installing that in the house aren't even computable, but does it not just attract streamers, so you end up with just a continuous vertical snaking streamer to the screen? (OK you can run lower power, but that is not really the aim)

Regards
Phil Tuck

www.hvtesla.com



-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Kurt Schraner
Sent: 14 April 2011 05:09
To: Tesla Coil Mailing List
Subject: Re: [TCML] Alternate RF Ground

The screen is made of insulating material, not semiconductive.
It's quite effective. A link is here:

http://home.datacomm.ch/k.schraner/hv_screen.htm

And, yes, it's in Switzerland.
Regards

Kurt



Jim Lux wrote:
> On 4/13/11 6:02 AM, dave pierson wrote:
>>>> Electrically it would help a lot.  Aesthetically it would suck 
>>>> bigtime.  If you could leave off the side toward the audience it 
>>>> would still be a big help.  You could hoke the cage up to make it 
>>>> look like some kind of lab walls.
>>    An open sided 'cage' will catch SPARKS/ARCs only.
>> 
>>    EMI/RFI will propagate freely.
> 

<snip>


> My guess is that TC cages work because they contain where the sparks 
> physically go, and more importantly, they provide a low impedance 
> return path to the coil for the spark current.  That is, the E field 
> from the spark doesn't penetrate the cage very much, so there's not 
> much capacitive coupling from the sparks or coil to things in the 
> surrounding (mic cables, power cords, etc.).
> 
> It's like putting a grounded electrostatic shield  in the middle of a 
> capacitor.
> 
> And if this is the case, then whether your cage has 6 sides or 5 or 3 
> doesn't make as much difference as whether you have something 
> conductive between source and victim.
> 
> (didn't one of the long-time list members do some stuff with a 
> semiconductive sheet hung horizontally above their coil to prevent 
> "roof strikes"...  In Switzerland, I think, but maybe Germany.
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