RE: [TCML] Variac

["Lau, Gary" <Gary.Lau@xxxxxx>]

I think this thread was originally about whether one should gradually increase the voltage to the NST (ramping), as opposed to going from 0 to 100% with the flick of a switch. Is that what you're talking about, or are you concerned with the ~20V boost above nominal that the Variac provides?

I would hope that the NST insulation wouldn't have that tight a margin that a 17% increase would be a problem, but I guess I shouldn't underestimate an industry's determination to cut corners.  I know that most coilers take advantage of the boost.  Whether that puts us at a greater risk is unknown.

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Phillip Slawinski
> Sent: Wednesday, June 25, 2008 11:06 AM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Variac
>
> With all this talk about how weak the insulation is on NSTs I just assumed
> it was a bad idea.  Is it okay as long as the NST isn't running open?
>
> On Wed, Jun 25, 2008 at 9:23 AM, Lau, Gary <Gary.Lau@xxxxxx> wrote:
>
> > I've never heard that; why should that be a problem?
> >
> > Regards, Gary Lau
> > MA, USA
> >
> > > -----Original Message-----
> > > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > > Behalf Of Phillip Slawinski
> > > Sent: Wednesday, June 25, 2008 10:12 AM
> > > To: Tesla Coil Mailing List
> > > Subject: Re: [TCML] Variac
> > >
> > > Isn't it a bad idea to ramp up the voltage with an NST?
> >
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