Re: Strange shock (fwd)

["Daniel Boughton" <daniel_boughton-at-yahoo-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Antonio, 

I have seen this effect in un-varnished coils as well.
It is quite clear to me that we have a DC charging
effect during coil operation. I have seen this in
coils of all sizes but most prominently in the
equidrive (push pull) configuration.'

While dielectic materials on the coil and the coil
form(as well as the ambient)  hold static charge I do
not believe we are witnessing effects from teh
electron cloud around the coil. We are seeing a DC
storage of energy as a component of the charging
technique. I bet you will not see this on a continuous
wave vacuum tube coil, no matter how much varnish you
have on it.

Dan Boughton
--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Ed Phillips" <evp-at-pacbell-dot-net> 
> 
> > > Original poster: "Daniel Boughton"
> <daniel_boughton-at-yahoo-dot-com>
> > 
> > > I too have seen this effect with coils that
> either
> > > have heavy varnish or heavy insulation on the
> > > windings. The static charge comes from the last
> half
> > > of the charging cycle in the primary circuit. It
> is
> > > esentially varying +DC or -DC (varying
> sinusoidally
> > > and changes polarity when it drops to 0 Volts).
> > > Distributed capacitance between the windings
> holds the
> > > charge until a larger capacitance (human
> touch)causes
> > > an inrush of current (shock) to estanblish
> > > equilibrium.
>  
> > Antonio Carlos M. de Queiroz
> 
> 	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.
> 
> 	By the way, I first observed this effect many years
> ago when Î removed
> a small secondary coil from the mounting base and
> was handling it by
> itself, with no external connections.
> 
> Ed
> 
> 
> 


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