skin effect

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

Original poster: "Ryan Molecke by way of Terry Fritz <teslalist-at-qwest-dot-net>" <ryan-at-molecke-dot-com>

My small coil actually resonates at around 3.3 MHz, does anyone know if this
would be a high enough frequency to cause the current to run completely over
the skin?

I have taken the streamers from my coil directly to my hand (without much
shock sensation), and I have also done this with a coil operating at around
1.7 MHz, with more shock sensation. Does the amount of current in the
streamers depend directly on the turns ratio of the coil?

Ryan



-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, May 06, 2003 5:55 PM
To: tesla-at-pupman-dot-com
Subject: Re: Man inside sphere electrode (electrum)


Original poster: "Ben McMillen by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<spoonman534-at-yahoo-dot-com>

Hi all,
     I've heard that they do the same thing with a figure 8
shaped coil and induce currents in the brain.. supposedly
causing halucinations.. I have no idea what kind of
currents or energies are involved.. Some kid here at the
university wanted to try it with my 5400J can crusher.. I
told him he was crazy!

Coiling In Pittsburgh
Ben McMillen

--- Tesla list <tesla-at-pupman-dot-com> wrote:
  > Original poster: "Finn Hammer by way of Terry Fritz
  > <teslalist-at-qwest-dot-net>" <f-h-at-c.dk>
  >
  > guys!
  >
  > It is possible to induce electric current into the human
  > body, it is
  > done for therapeutic reasons, and the current induced
  > appear to occeur
  > in the nerves.
  > http://www.magstim-dot-com
  >
  > I have seen one such machine at work, at the Electricity
  > Museum, and a
  > one turn coil in proximity of the 17 turns work coil
  > revealed that the
  > pulse length is 100µS, the current producing it is in the
  > thousands of
  > amperes, and the flux intensity is more than 2 Tesla.
  >
  > Funny to work with: Place the coil where the halo of a
  > saint would be,
  > fire the coil, and you get funny looking, involuntary jaw
  > movements. One
  > of the office secretaries bit her tongue!. What a laugh
  > :-).
  >
  > It is a disk launcher, really.
  >
  > Cheers, Finn Hammer
  >
  >
  >
  > Tesla list skriver:
  >  >
  >  > Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>
  >  >
  >  > Hi Rik,
  >  >
  >  > At 04:40 PM 5/5/2003 +0000, you wrote:
  >  >
  >  > >Hi all,
  >  > >web surfing i came across this
  >  > >http://www.lod-dot-org/teslacoils.html
  >  > >
  >  > >man sitting in  a cage electrode on top of his large
  > coil.
  >  > >He is safe from electric fields there (well known
  > Faradey cage effect),but
  >  > >i was wondering what about magnetic fields.?
  >  > >I suspect part of magnetic field could enter hollow
  > sphere and induce
  >  > >currents in man's body.
  >  > >How real is danger of that possibility?
  >  > >
  >  > >Rik
  >  >
  >  > The magnetic fields at the top of the coil are not
  > that
  >  > extraordinary.  Maybe 10's of amps.  Greg had an
  > electronic oscilloscope
  >  > with him that was not harmed.  I would guess if people
  > can stand the
  >  > magnetics of MRI machines, they can stand top of Tesla
  > coils easily.  The
  >  > currents in the coil could induce some voltage around
  > one's body.  But the
  >  > resistance of the body is so high the current would be
  > nil.
  >  >
  >  > Cheers,
  >  >
  >  >          Terry
  >
  >