Re: [TCML] Still stuck at 36"

[futuret@xxxxxxx]

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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