Re: Skin depth (again) was: Re: Newbie with questions...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: robert & june heidlebaugh <rheidlebaugh-at-desertgate-dot-com> 

As frequency increases dammage also increases. at some frequencies the power
travels on the surface of the skin, but as the frequency increases above
that dammage increases again. At 23CM a few milli watts will dammage you and
at 2CM it will cook you. IN GENERAL KEEP YOUR HANDS OUT OF SPARKS.
    Robert  H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Fri, 12 Sep 2003 15:55:07 -0600
 > To: tesla-at-pupman-dot-com
 > Subject: Skin depth (again) was: Re: Newbie with questions...
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Fri, 12 Sep 2003 16:04:51 -0600
 >
 > Original poster: Jim Lux <jimlux-at-earthlink-dot-net>
 >
 > At 10:01 AM 9/12/2003 -0600, you wrote:
 >
 >> Also, after finding that the resonant frequency is around the 700-800 Khz
 >> range (High enough to cause the skin effect in a human), I've consistently
 >> drawn sparks about 3 to 3.5 inches long off it with my fingers.
 >
 >
 > Oh Ho!.... the human isn't all that hot a conductor, so the skin depth is a
 > LOT deeper than you think it is.  At 150 kHz, skin depth estimates range
 > from 30 to 95 inches!  Skin depth scales as the square root of frequency,
 > so at 1.5 MHz, skin depth is 3 to 9.5 inches...
 >
 >
 > Don't draw those sparks with your fingers!!!
 >
 >
 >
 >