RE: [TCML] Still stuck at 36"

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

Hi John,

I don't recall if I made a careful performance comparison between the sucker and vortex gaps.  At the time I was changing a lot of things on my coil, and probably since spark measurement is so subjective, I chose to just focus on the more quantitative gap loss measurements, which were unequivocal.  See http://www.laushaus.com/tesla/vortexgap.htm 
So unresolved is whether quenching differences between sucker and pressurized gaps might offset the lower losses seen in the blown gaps.  But if I had to guess, I would guess that the blown/vortex/hyperbaric gap would have superior performance.  It's just a bit more difficult to build than a sucker gap.

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of futuret@xxxxxxx
> Sent: Sunday, January 25, 2009 1:08 PM
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Still stuck at 36"
> 
> Theoretically, a sucker gap may work better if built as a pressurized
> gap.
> In such case it won't be a sucker gap of course.
> Dr. R's hyperbaric gap is probably a pressure gap, not a sucker
> gap.  After all, the word "hyperbaric" means "higher than normal
> atmospheric pressure.  By using a pressurized air gap, this should help
> reduce gap
> losses since pressurized air breaks down at a narrower gap setting
> than lower pressure air.  Also pressurized air should quench better
> than lower pressure air.  Just run the vacuum motor in reverse
> to produce the pressurized air.  This is the concept Gary Lau
> used in his vortex gap.  I remember that Gary used a sucker
> gap at first then switched to the vortex pressurized gap, but
> I don't remember if he saw a noticeable improvement in
> spark length.  Perhaps Gary will comment.
> 
> John
> --
> 
> 
> -----Original Message-----
> From: Phil Tuck <follies@xxxxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Sent: Sun, 25 Jan 2009 4:07 am
> Subject: [TCML] Still stuck at 36"
> 
> 
> 
> Hello.
> If you do go for a sucker gap as Dr R suggests, the 'normal' distance
> for a
> gap may not always apply. After some head scratching I found out that
> the
> vacuum that is created, alters the normal spark distance. (I'm now
> using 10K
> / 100ma on a 192 thou or 4.9mm gap)
> 
> If I forget to start the suction (semi-industrial vac cleaner) my gap
> will
> only start if the Variac is set around 220 volts (I'm UK based at
> 240volts)
> , whereas with the suction on, it will start at about 130 volts and you
> can
> go as low as 90 volts running. I found you need good suction, vac
> cleaner or
> leaf vacuum cleaner (not a leaf blower) If you build it bigger than you
> need
> you have capability for adding another NST as well. :-).
> 
> Phil
> 
> -----Original Message-----
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> Sent: 25 January 2009 05:09
> To: tesla@xxxxxxxxxx
> Subject: Tesla Digest, Vol 15, Issue 33
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