Re: Tesla Coil Operation - was "Harmonics"

• To: tesla-at-pupman-dot-com
• Subject: Re: Tesla Coil Operation - was "Harmonics"
• From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz> (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Sun, 07 Feb 1999 20:19:39 -0700
• Approved: twf-at-verinet-dot-com

Hi John,

> Original Poster: "John H. Couture" <COUTUREJH-at-worldnet.att-dot-net> 
> 
> 
>   Malcolm -
> 
>   Can you give us more info on the mechanical descriptions and the 1st order
> differential equations? Also on net electrical effect on the tank observed
> on scope? Are you referring to your waveform photos?   

I am indeed. The linear decrement has been talked about ad nauseum. 
Ignoring firing voltage and taking conduction voltage as being 
reasonably constant, one can approximate Rgap = Vcond/Igap. I am sure 
there are dozens of posts saying this in the archives. For a fuller 
description, refer to posts from Ed Harris circa 1996. A physical 
analogy might crudely be one of a hose that expands as water volume 
moving through it increases. Interestingly enough, it is very likely 
the discharge channel in air is doing exactly the same thing as gap 
current increases. The only evidence of a positive resistance arc
characteristic is for a discharge running at saturation current in a 
confined space (e.g. xenon flashtube).

Malcolm

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