Re: Doubling NST voltage? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sun, 29 Oct 2006 11:37:22 -0800 (PST)
From: C. Sibley <a37chevy@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Doubling NST voltage? (fwd)

I still don't get it, why would you need an isolation transformer for the
second transformer?  It seems to me there would be no problem as long as
the CT of the secondaries were left isolated (i.e. floating).

Is the concern there would be a breakdown between the seconday to primary
within a transformer?

---------- Forwarded message ----------
Date: Sun, 29 Oct 2006 09:55:51 -0700
From: S&JY <youngsters@xxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Doubling NST voltage? (fwd)

What you say is true.  But what you are missing is that you would need a 120
V to 120 V isolation transformer to power the 2nd NST, and the isolation
transformer would need enough insulation to hold off many thousands of
volts.  Such a specialized transformer probably would cost more than a NST.
--Steve Y.
----- Original Message ----- 
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, October 29, 2006 9:44 AM
Subject: Re: Doubling NST voltage? (fwd)


> Original poster: List moderator <mod1@xxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Sun, 29 Oct 2006 07:49:21 -0800 (PST)
> From: C. Sibley <a37chevy@xxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Doubling NST voltage? (fwd)
>
> It seems to me that if the cases were isloated and ungrounded this would
work, and the voltage across each NST wouldn't exceed their individual
output.  The higher voltage would only exist across both, and would stress
the individuals.  What am I missing?
>
> Curt.
>
>
> ----- Original Message ----
> From: Tesla list <tesla@xxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Sent: Sunday, October 29, 2006 7:04:18 AM
> Subject: Re: Doubling NST voltage? (fwd)
>
>
> Original poster: List moderator <mod1@xxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Sat, 28 Oct 2006 15:46:31 +0100
> From: resonance <resonance@xxxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Doubling NST voltage? (fwd)
>
>
>
> No this will not work.
>
> The tar-like insulation in the nsts will quickly break down.
>
> NSTs are really only designed to operate at 12 kV for 1/4 sec to ionize
the
> gas in a neon tube.  Then the voltage drops back to approx 500 volts and
> they serve as a constant current source to keep the gas ionized in the
tube.
> They are not designed to provide HV for a long period of time.  They do
this
> in Tesla coil service but are constantly being strained in this
operational
> mode.  Double the voltage will not work.  Also, you can't hook them in
> series because the center is grounded --- you would need two xmfrs without
a
> center-tap grounded configuration to accomplish this task.
>
> Dr. Resonance
> >
> > Is it possible to connect my NST's in series, for double the voltage?
I've
> > run them in parallel before for the ma's, but I'm wondering if setting
> > them in series is do-able. If this has been done before, is there
anything
> > I need to do re: grounding, connecting, or whatever with their cases?
> > FWIW, I'm thinking of using a couple of 9/30's. I don't have 220v
> > available at my workbench, so I'd have to stick with 110v, if that's an
> > issue. Thank you all in advance, for any info you might have.
> >
> > Neal.
> >
> >
> >
>
>
>
>
>
>
>
>