Re: series or parallel???

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: m.j.watts@xxxxxxxxxxxx 

Hi Gerry,

On 30 Nov 2005, at 13:20, Tesla list wrote:

> Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
>
> Hi Malcolm,
>
> I think that you are right that the transformer sees the same peak
> voltage in eigher case.  The peak capacitor voltage during the bang
> can not get higher than the initial voltage it was charged to (rings
> down, back up, back down, and so on).  Maybe the real difference is
> the frequency that is associated with the peak voltage.  In the
> parallel capacitor case, the peak voltage the NST is subjected to is
> at the RF frequency of the tank.  With the parallel spark gap,  the
> peak voltage is during charging and is 60Hz stuff.  The RF voltage
> during the bang is much lower cause the plasma resistance is in the
> order of a few ohms.
>
> Then again, maybe we need to look at the problem from the NST
> secondary coil's perspective instead of the terminal's perspective
> for the parallel capacitance case. If the NST secondary is trying to
> output say +10000 Vpeak at the time of the bang and the Cp has just
> oscillated to -10000Vpeak, what does this do to the
> insulation???  and the current???   Got to think about this one.

I don't think it's going to happen. The timescales are vastly
different. The above would be predicated on the tank ringing
losslessy for a considerable time.

?
Malcolm

> Gerry R.
>
> >Original poster: m.j.watts@xxxxxxxxxxxx
> >On 29 Nov 2005, at 7:32, Tesla list wrote:
> >
> > > Original poster: robert heidlebaugh <rheidlebaugh@xxxxxxxxxxxxxx>
> > >
> > > Malcolm; At resonance and only at resonance Xl and Xc are the same and
> > > voltage of the coil or capacitor is Xl times I which may be well over v
> > > input The gap voltage is v input  If the transformer is across
> > the gap > the
> > > voltrage is V input. Across a reactive component like the capacitor the
> > > voltage can be anything based on Z of the combination and the
> > current > not V
> > > input, but more than v input.
> > >     Robert   H
> >
> >Draw out the circuit for both situations. You can treat the TC
> >primary as a piece of wire at mains frequency. You will see that
> >both situations are equivalent when considering gap settings.
> >
> >Malcolm
> >
> >
> > >
> > >
> > >  > From: "Tesla list" <tesla@xxxxxxxxxx>
> > >  > Date: Mon, 28 Nov 2005 00:28:28 -0700
> > >  > To: tesla@xxxxxxxxxx
> > >  > Subject: Re: series or parallel???
> > >  > Resent-From: tesla@xxxxxxxxxx
> > >  > Resent-Date: Mon, 28 Nov 2005 00:27:08 -0700 (MST)
> > >  >
> > >  > Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>
> > >  >
> > >  > On 27 Nov 2005, at 18:10, Tesla list wrote:
> > >  >
> > >  >> Original poster: robert heidlebaugh <rheidlebaugh@xxxxxxxxxxxxxx>
> > >  >>
> > >  >> Daniel;First of all the primary circuit is series. The question is
> > >  >> what is the power parallel with? For best results the power (nst) is
> > >  >> placed parallel with the spark gap to protect your NST from
> > >  >> overvoltage. If you place it parallel with your capacitor 
or coil > you
> > >  >> are subjecting it to the resonont over voltage of the
> > resonant > circuit
> > >  >> which can be up to 5x the input voltage. That can distroy your NST.
> > >  >> Acrossx the spark gap you see only the voltage the gap spacing will
> > >  >> allow.
> > >  >> Robert   H
> > >  >
> > >  > One of the characteristics of a series resonant circuit is that each
> > >  > component (L and C) sees the same voltage with a phase/time
> > >  > displacement is it not? The reactances are the same at resonance and
> > >  > the currents are the same so......
> > >  >
> > >  > In both cases, the gap setting determines the voltage the
> > >  > transformer is subjected to. In the case where the capacitor is in
> > >  > parallel with the transformer however, the transformer sees the full
> > >  > primary ringing voltage whereas with the gap in parallel with the
> > >  > transformer, the transformer sees momentary transients only.
> > >  >
> > >  > Malcolm
> > >  >
> > >  >
> > >  >> --
> > >  >>
> > >  >>
> > >  >>> From: "Tesla list" <tesla@xxxxxxxxxx>
> > >  >>> Date: Sat, 26 Nov 2005 17:01:54 -0700
> > >  >>> To: tesla@xxxxxxxxxx
> > >  >>> Subject: series or parallel???
> > >  >>> Resent-From: tesla@xxxxxxxxxx
> > >  >>> Resent-Date: Sat, 26 Nov 2005 16:57:28 -0700 (MST)
> > >  >>>
> > >  >>> Original poster: "Langer Giv'r"
> > >  >> <transworldsnowboarding19@xxxxxxxxxxx> > > Hi again, I 
have seen > many
> > >  >> schematics where the spark gap is series > and the Capacitor is
> > >  >> parallel and vice-versa... Which is hte proper > way to put the LC
> > >  >> circuit, which is parallel and which is > series??  Thanks 
for > input.
> > >  >>>> Daniel From Canada > > _ > >
> > >  >>
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