Re: Interesting Skin Depth Data

• To: tesla-at-pupman-dot-com
• Subject: Re: Interesting Skin Depth Data
• From: "Alex Crow" <user-at-alexcrow.clara-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sat, 11 Mar 2000 10:57:48 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Dale,

If the arc event is of such high frequency, what is it that causes the pain
from
a power arc taken to the body, even via a small metal object? I was pulling
arcs
off Brian Basura's mini-twin with a car-key, and if you got too close and the
arc became brighter, there was a noticeable prickling and muscular
sensation. Is
this due to sharp pulses of one polarity from Ctop? The arc frequency might
become isolated from the ground as regards the Xl of the secondary, but the
conduction path is of low enough resistance to provide paths from all
transients
(and of course, as we know, potentially lethal 50Hz).

Alex


Tesla List wrote:

> Original Poster: "Dale Hall" <Dale.Hall-at-trw-dot-com>
>
> Hi all,
> The theory of using the resonator frequency may be perhaps
> flawed when doing skin affect analysis.
>
> Based upon my oscilloscope observations the
> frequency of an arc event is in the MHz range.
>
> The entire arc event is over in less that a microsecond (1MHz)
> The arc risetimes I've measured are in the order of
> ~25nS to ~100nS (~20MHz-5MHz) and some even higher freq.
>
> The resonator serves to provide charge to the Csec.
>
> The discharge of Csec generates the arc freq quite independent
> of the resonator ring up freq, for any one arc event.
>
> At 10-20 MHz arc oscillation, the ~30 MHy of the secondary
> represents good XL isolation from the arc (like a series choke).
>
> At 10-20Mhz the skin affect may well be more of a factor in the human case.
>

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