RE: Resulting static after TC runs

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>

Hi Terry, all,
                Further to my note at the bottom of this piece:
If the explanation about the "last swing" is correct, then the effect
would be noticeable with a coil operated with a single shot of
energy. The fact that one can get bites off the secondary of a SG
coil after a reasonably long run but not (that I've noticed anyway)
after a single shot can't be discounted.

Malcolm

On 1 Mar 2005, at 13:34, Tesla list wrote:

> Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
>
> Hi,
>
> Steve's explanation seems to make sense to me.  The OLTC can easily
> "always" cut "off" on say a positive half cycle.  The net charge can
> always be FAR positive if one wants.  Unlike a conventional coil,
> OLTC's and the newer disruptive electronic machines have extreme
> control over quenching.  They can easily do tricks like this to the
> primary current ;-))
>
> http://hot-streamer.com/temp/OLTC08-18-08.gif
>
> You can't do that with grampa's old spark gap coil!!!  DC Cox made a
> gap that could "once in a great while" cut off at a primary current
> peak but it is an "extreme" high speed quencher.  But quenching
> "whenever one feels like it" with "perfect" bang to bang repeatability
> is just a typical thing for OLTCs.
>
> It is a bit of a challenge since they "must" do these things and
> survive since making them quench like spark gaps coils would be sort
> of hard.  OLTC's quench "whenever they want to" irregardless of the
> primary current!  The timing of the LM555 timer (uPs nowadays ;-)) is
> in full control of quenching times and nothing else!
>
> The secondary voltage will follow the primary current pretty
> predictably so even if the secondary rings on a bit it will still tend
> toward one polarity of net charge.  The negative polarity tend to
> breakout much easier so that further could amplify the effect.
>
> I suppose if one "wanted" to deliberately spray high voltage charge
> all over the place (maybe good for head colds...), something like an
> OLTC would be perfect for that (there goes that patent >:o)))  It
> would make those little room air ozone toys look like quack science :D
>
> Often when the "whole" room" seems to have a static charge, it is
> often the case that the room has drained back to ground and it is the
> experimenter that is actually all charged ;-))
>
> Cheers,
>
>          Terry
>
>
> At 10:49 PM 2/28/2005, you wrote:
> >On 28 Feb 2005, at 12:54, Tesla list wrote:
> >
> > > Original poster: "Derek Woodroffe" <tesla@xxxxxxxxxxxxxxx>
> > >
> > > Steve,
> > >  I have noticed a similar static charge on a couple of static gap
> > > coils, and my smaller OLTC.
> > >
> > >  I put it down to the last voltage swing, either -ve or -ve from
> > >  the
> > > secondary would leave a charge on any non conducting surface..
> > >
> > >  With the amount of control you have over your burst length you
> > >  are
> > > probably leaving a net +ve or -ve charge after each burst
> > > especially if you are cutting off the burst at a half cycle. Maybe
> > > this net difference is what is making the build up of charge..
> > >
> > >  Cheers
> > >  Derek
> >
> >I don't think that explanation earns the cigar. The amplitude of the
> >"final swing" is ??????
> >
> >Malcolm
> >
>
>
>