Re: [TCML] Ambient Potential Polarity of TC - John F or Dave S has answer?

[sparktron01@xxxxxxxxxxx]

Hi Bert 

Richard, Alex, and I did some measurements in late 1990's using a 
laboratory grade electrostatic voltmeter. We could not determine the 
polarity of the charge, but if memory serves me right, we were seeing 
on the order of 15kV at about 12-15' laterially from Nemesis (Hull's 
Tesla Coil). With machines from <1kVA to Hull's machine (>12kVA) 
voltage dropped at a inverse square law to distance from streamers. 
I have likewise seen circumstantial evidence of DC static fields 
present around TC's (run a small machine in bedroom, dust accumulates 
everywhere at a much faster rate then without running machine. This 
occurred while living at home, running a "Big TC" that I had built 20 yrs 
prior to meeting Richard ). 

The write up was in ESJ, could contact Hull and get additional info 
on when it was published. 

Best REgards 
Dave Sharpe, TCBOR/HEAS 
Chesterfield, VA 

----- Original Message ----- 
From: "Bert Pool" <micro_wave@xxxxxxxxxxx> 
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> 
Sent: Sunday, January 31, 2010 9:49:07 AM GMT -05:00 US/Canada Eastern 
Subject: Re: [TCML] Ambient Potential Polarity of TC - John F or Dave S has answer? 

As I recall, Richard Hull did some measurements with a Keithly 
electrometer, and determined that there was a steady state field. 
We know that positive and negative electrical discharges do NOT have 
identical characteristics, and *might* lead to a net charge of one 
polarity or the other. 

John Freau or Dave Sharpe, both who have visited Hull's labs back in the 
day, might be able to confirm this with more detail. Guys? 

Bert Pool 



stork3264@xxxxxxxxxxx wrote: 

>Assuming a simple quarter wave Tesla coil referenced to ground is there a measurable electrostatic field potential of the ambient space surrounding the top load? Without doubt, potential is varying between positive and negative with respect to ground. The question is there a measurable ES field of a single polarity? Is there favoring of positive or negative plasma discharge in air? Is there an inherent rectification of the plasma? For safety of our equipment measurements are usually AC. Has anyone performed a DC measurement of the ambient potential field referenced to ground? 
> 
>Stork 
> 
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