Re: Strange shock (fwd)

["Jim Lux" <jimlux-at-jpl.nasa.gov> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

A quick test could be to take a piece of single sided copper clad board,
ground the copper side and put it on a stand a few feet from the TC (out of
range of the sparks) with the insulating side towards the coil.  Then,
attach a few threads or similar insulating things (thin mylar ribbon would
also work?) to the copper clad.  Run the coil. If charge builds up, the
threads will be repelled away from the surface and stand out or up (as the
case may be).

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> From: Tesla list <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: Strange shock (fwd)
> Date: Saturday, July 15, 2000 3:30 PM
> 
> Original poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br> 
> 
> Tesla list wrote:
>  
> > Original poster: "Ed Phillips" <evp-at-pacbell-dot-net>
> 
> >         Based on my observation here, the charge is stored in the
varnish
> over
> > the windings.  Typical example is when I run my hands over the surface
> > of a small coil with heavy shellac layer on it.  I get multiple
"shocks"
> > as my hands move to various places on the outside of the coil.  Similar
> > to the effect I get when I use the VDG to store charge on a piece of
> > sheet plastic.  Can't imagine any other possible storage mechanism.
> 
> Without any doubt. The grounded secondary coil attracts charges created
> by streamers/sparks to the surface of the varnish covering the coil, 
> where they stay until slowly drained by leakage resistances, or by 
> someone touching the coil. A good shock can be probably obtained if 
> someone touches the secondary wire (or the top terminal) and the surface 
> of the secondary simultaneously (obviously after turning the coil off!).
> Try to use a VDG to charge a piece of sheet plastic while holding your
> hand at the back of the sheet (making a ground connection similar to 
> what the secondary coil does), and then touch the face of the plastic 
> that was charged by the VDG. For a greater effect, try the same with a
> metalized (at one side, that you touch) plastic sheet.
> 
> Antonio Carlos M. de Queiroz
> 
> 
>