RE: I need advice on sync spark gap

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>

Yep!!  Hopefully the MOVs saved the NST!

Cheers,

         Terry

At 08:55 AM 11/8/2004, you wrote:
>When running a 15/60 on a static gap, a .01uF cap is OK.  But when using
>a sync gap, one MUST use a much larger cap, or else the charging voltage
>will be excessive.  That's why your MOV's smoked.
>
>Gary Lau
>MA, USA
>
> > Original poster: "Robert Hanford" <pomnept-at-comcast-dot-net>
> >
> > Hi everybody, I have a problem that I'm sure is a no- brainer for most
> > experienced coilers.
> > My coil has been working fine with a vacuum gap, so I thought I would
> > experiment with a SRSG. Worked well at low power, but could not find
>the
> > "sweet spot" at full power, even with quite a bit of monkeying around.
>I
> > pulled the safety gap out a "little" too much, then it worked real
>well for
> > a few seconds, then my MOVs went kaput.I am using a Freau phase
>controller,
> > .011 MMC cap, 15k/60ma NST, and of course a SRSG. And a 4.5 inch
>secondary.
> > Well, the damage was done, so it was time to quit. I haven't checked
>my NST
> > yet.
> > I hope somebody might give me a few ideas about possible errors- what
>was
> > frustrating is that it was working so well at lower power. Do I need a
> > larger cap?
> > As always, any help is most appreciated.
> > Robert Hanford
> >