Re: Doubling NST voltage? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "miles waldron" <mileswaldron@xxxxxxxxxxx>

>From experience, if you hook two NSTs up in parallel, you can double their
current. You can't hook them up in series. It doesn't work. Don't argue
about it -- try it and see....


----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, October 30, 2006 7:02 PM
Subject: Re: Doubling NST voltage? (fwd)


> Original poster: Gregory Morris <gbmorris@xxxxxxxxx>
>
> Forgive me for being naive, but to me it seems that either way,
> whether you ground the centre or not you are going to see a 15kV
> difference between the outputs. In the centre-grounded situation one
> end is 7.5k above ground, and the other is 7.5k below, but in the
> floating situation you are still going to see the same differences
> between points in the coil, they can just be different relative to
> ground, but ground is arbitrary, is it not? Sorry if I'm missing
> something, but I'm just a student, as yet.
>
> Greg
>
> Tesla list wrote:
> >Original poster: List moderator <mod1@xxxxxxxxxx>
> >
> >
> >
> >---------- Forwarded message ----------
> >Date: Sun, 29 Oct 2006 15:27:17 -0500
> >From: Mike <mike.marcum@xxxxxxxxxxxx>
> >To: Tesla list <tesla@xxxxxxxxxx>
> >Subject: Re: Doubling NST voltage? (fwd)
> >
> >The reason most nst's 7500v and up are midpoint grounded is it
> >halves the insulation requirement (lowers cost). To series them this
> >would have to be moved to 1 of the ends, doubling the voltage stress
> >at the free end. Doable, but alot of work and wouldn't last long
> >(potting in oil instead of tar would help). If you really need 18kV
> >from a current limited source take a 15 kV nst and run it at 150v
> >from a  variac. Only trouble with this is right at the edge of core
> >saturation which could be a problem.
> >
>
>
>