RE: [TCML] NST's and ARSG's

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

I didn't follow:
> it was firing every time the gap came into phase
An async gap fires at random phase.  And:

> maybe I shoudn't have been running in the air
?

Running with a smaller than resonant cap may be a problem unless you're very sure that the break rate never got too low.

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Phillip Slawinski
> Sent: Wednesday, June 11, 2008 8:46 AM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] NST's and ARSG's
>
> Well my ASRG is set up to run over 120BPS  should be around 200BPS.
> I've got a saftey gap, and I had it set pretty close, it was firing
> every time the gap came into phase.  Maybe my NST has been weakened,
> maybe I shoudn't have been running in the air.  I do have a smaller
> than resonant cap, but I thought that would be okay since I had the
> gap set to break at ~240BPS.
>
> On Wed, Jun 11, 2008 at 6:48 AM, Lau, Gary <Gary.Lau@xxxxxx> wrote:
> > Since this question is about neither wax nor Phillips (?), I changed the subject
> line...
> >
> > I think that ARSG's may have been over-vilified.  I can see no mechanism where
> having a too-high break rate would be stressful to an NST.  High break rates in no
> way cause higher voltages, currents, or anything else that would damage an NST.
> >
> > What I suspect is that some folks ran their ARSG's at too LOW a speed, or
> perhaps turned on the NST before spinning up the ARSG.  Having a speed control
> knob on the RSG invites one to vary it too low.  This would be the same as opening
> a static gap so wide that it never fires.  This would cause the cap voltage to ring up
> to self-destructive voltages on successive mains half cycles, rather than being
> discharged with normal gap firings.  Just ensure that the RSG is always running at
> at least 120BPS.  And, ALWAYS ALWAYS ALWAYS (cannot be overemphasized)
> use a properly set safety gap in parallel with an RSG - sync or otherwise.  They're
> cheap and easy to build and there is no excuse not to have one.  You do have one,
> right? ;-)
> >
> > Regards, Gary Lau
> > MA, USA
> >
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Phillip Slawinski
> > Sent: Tuesday, June 10, 2008 11:56 PM
> > To: Tesla Coil Mailing List
> > Subject: Re: [TCML] phillips question about wax and more
> >
> > While we're on the topic of NSTs, ASRGs are pretty bad for them right?
> >  It seems that my NST keeps shorting, and I think it's due to the
> > ASRG.
> >
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