Spark Gap (fwd)

• To: "'Tesla List'" <tesla-at-pupman-dot-com>
• Subject: Spark Gap (fwd)
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Tue, 26 May 1998 23:10:52 -0500
• Approved: tesla-at-stic-dot-net

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From:  Malcolm Watts [SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent:  Monday, May 25, 1998 11:33 PM
To:  Tesla List
Subject:  Re: Spark Gap (fwd)

Hi Jim,

> From:  Jim Lux [SMTP:jimlux-at-earthlink-dot-net]
> Sent:  Monday, May 25, 1998 10:42 AM
> To:  Tesla List
> Subject:  Re: Spark Gap (fwd)
> 
> 
> 
> > 
> > I can't see a single reason why it should be lower. Besides, Rgap is 
> > a dynamic impedance which varies with Ip. Multiple gaps most 
> > certainly have a higher voltage drop when conducting as each has a 
> > minimum saturation voltage, again dependent on Ip.
> > 
> > Malcolm
> > 
> 
> That voltage is pretty darn low, though. Consider an arc welder, where the
> voltage drop across the gap is a few 10's of volts. Even with 10 gaps in
> series, a hundred volts of drop is pretty small compared to the several kV
> on the cap.

Agreed. But Vcond does rise as Ip drops. I think Jim Fosse measured 
several kV across a series gap by the time it went out.

Malcolm

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