Re: [TCML] still stuck at 36

[DC Cox <resonance@xxxxxxxxxxxx>]

It's not clear why to me either.  My best guess is better cooling due to the
high velocity air, and perhaps increased turbulence
around the ends of the copper pipes.

I know that most coils performance jumps in amazing quantity of spark output
when the hyperbaric gap is used.  I have never used it above 4 kVA as a
single gap, but did some experiments at 7 kVA with a dual series hyperbaric
gap and it seemed to work as good as a small rotary.

Perhaps looking at scope ringdowns with and without a hyperbaric gap might
provide some clues.

Dr. Resonance




On Tue, Jan 27, 2009 at 1:51 PM, Lau, Gary <Gary.Lau@xxxxxx> wrote:

> I don't disagree that hyperbaric gaps work well, but I'd like to be clear
> on why.  Too often on this List, the word "quenching" is used incorrectly.
>  My measurements showed conclusively that hyperbaric gap losses were lower
> than in a sucker gap, but I made no attempt to measure actual quenching.
>  Quenching is unrelated to gap losses and refers to how many pri-sec energy
> trades occur before the gap extinguishes.  In fact, I think that typically,
> lossy gaps (at least multi-segment gaps) have superior quenching.
>
> So, have you seen evidence that actual quenching, as observed on a scope,
> was superior with the hyperbaric gap?  Was this with free-air streamers or
> grounded (connected) streamers?  Seems like a very difficult thing to
> accurately compare between two systems.
>
> Regards, Gary Lau
> MA, USA
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> > Behalf Of DC Cox
> > Sent: Tuesday, January 27, 2009 1:31 PM
> > To: Tesla Coil Mailing List
> > Subject: Re: [TCML] still stuck at 36
> >
> > Bill:
> >
> > What was your maximum spark before you used the hyperbaric sparkgap?
> >
> > Also, put a variac on the vac. cleaner motor, and fine adjustment of the
> > speed will increase your output even more.  Usually best output
> > around 75% of the variac.
> >
> > I know they work great.  They always increase your sec spark output
> > dramatically which means we have been underquenching
> > with most of our previous designs.
> >
> > Dr. Resonance
> >
> >
> >
> >
> > On Tue, Jan 27, 2009 at 5:50 AM, Bill Bohn <b.jbohn@xxxxxxxxxxx> wrote:
> >
> > > I built the hyperbaric gap as described WOW!Now I get 44" I am using a
> shop
> > > vac for suction.I am using 5 of the 6 strings of caps.I think I did
> some
> > > damage
> > >
> > > To my 5-1/4 coil.Now I have a 6.625" secondary wound 26.5" 1060 turns.
> Top
> > > load is 4.5x18 toroid and a 7" sphere.Seems best with the primary
> clamped
> > >
> > > At turn 5.The spark sounds somewhat eratic and choppy.IT will smooth
> out
> > > some by adjusting the spark gap closer at the loss of streamer length .
> > >
> > > What is the method of measuring BPS?IT doesn't seem to sound right.The
> > > coupling between primary and secondary is 0.I am going to put the 6
> strings
> > > of
> > >
> > > My mmc cap in but I think it will be best tuned at about turn 2 and
> become
> > > even more erratic.
> > >
> > > I am getting positive results and thank everyone for all the ideas and
> 2
> > > cents worth.
> > >
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