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

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

Original poster: "Chris the great" <downnessisgoingup-at-hotmail-dot-com> 

Would it be safe to do this with a low power coil (1-50 watts)?
At this power would internal harm be non-existant?  50 watts wouldn't cause 
burns if you didn't expose yourself for long, or would it?




>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Skin depth (again) was: Re: Newbie with questions...
>Date: Fri, 12 Sep 2003 15:55:07 -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!!!
>
>
>

_________________________________________________________________
Help STOP SPAM with the new MSN 8 and get 2 months FREE*
http://join.msn-dot-com/?page=features/junkmail