RE: Coil schematics?

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

Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Gary.Lau-at-compaq-dot-com>

The schematic showed the safety gap wired directly in parallel with the
main static gap.  If the safety gap is set for 25kV and the main gap is
set for 21kV, I can't think of any reason for the safety gap to ever
fire, since they're both connected to the same point and see the same
voltage.  The main gap will always fire first, so the safety is simply
redundant.

There may be some physical distance between the NST secondary and the
main gap.  It has been observed that a safety gap may indeed fire
independently of the main gap.  The reason for this has not been
researched, but the distance from the NST to the main gap may have
something to do with it.  If the NST is seeing a higher voltage than
that present at the main gap, then you want the safety directly at the
NST.

Regards, Gary Lau
MA, USA


Original poster: "Steve White by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <slwhite-at-zeus.ia-dot-net>

What is the reasoning here? Both locations are electrically identical.


> Original poster: "Lau, Gary by way of Terry Fritz
<twftesla-at-qwest-dot-net>"
<Gary.Lau-at-compaq-dot-com>
>
> I think that you want the safety gaps wired directly across and
> physically close to the NST secondary (i.e. on the left side of the
> resistors), not in parallel with the main spark gap.
>
> Gary Lau
> MA, USA
>
> >Original poster: "mbarbani by way of Terry Fritz
<twftesla-at-qwest-dot-net>"
> ><mbarbani-at-yahoo-dot-com>
> >
> >Hi Neil,
> >
> >Here's a schematic of my coil.
> >
> >http://hot-streamer-dot-com/temp/Teslaschem.jpg
> >
> >It's got all the "normal" required parts that most
> >coilers use, plus one part that's my own addition.  Take a look at
the
> relay on
> >the primary side of the NST.  It is there to switch power to the NST,
> because I
> >like the idea of being able to run the coil with a hand-held
> pushbutton, but
> >don't like the idea of switching 120v in my hand directly to the NST
> even
> >though the button is well insulated. It actually switches power to
the
> relay,
> >which in turn gives power to the NST, thereby reducing the current
that
> is
> >going thru the pushbutton in my hand.  Both common poles of the relay
> are
> >ganged to give extra switching power to the NST.
> >
> >Good luck,
> >Marc B.
>
>
>
>