Re: I need advice on sync spark gap

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

Original poster: "Robert Hanford" <pomnept-at-comcast-dot-net> 

Thanks for your replies. They are extremely helpful. This particular NST was
cobbled together from two faulty transformers, and in this case the
transformer died to save the MOVs! They had gotten hot, but evidently are
still alive. I will try the SRSG again soon with another cap.
..Sincerely,
Robert Hanford
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, November 08, 2004 6:17 PM
Subject: RE: I need advice on sync spark gap


 > 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
 > > >
 >
 >