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RE: [TCML] Climbing Arcs
I never built a really large one. I have however observed that any air
movement across the ladder will disrupt the arc. Conducted some experiments
tilting the electrodes from vertical it would not work beyond 30 degrees.
The curve of the arc remained vertical while the electrodes were tilted. I
surmised that heat causes the arc to rise and heat raises vertically so
won't work when it passes about 30 degrees.
Ken
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Sfxneon@xxxxxxx
Sent: Tuesday, May 27, 2008 12:10 AM
To: tesla@xxxxxxxxxx
Subject: [TCML] Climbing Arcs
Hi All,
I have a spare 12.5 kVA/20 kV bombarding transformer and sliding choke with
which I'm building a large Jacob's ladder using 3/4" x 10' EMT conduit. It
works reasonably well, but the arc tends to rise up the rails too slowly and
the
middle of the arc outruns the ends, resulting in a restart before it
reaches
the top. I've adjusted the angle of the rails from near parallel to about
18" apart at the top, without much success.
Does anyone know how to tweak the performance of a big climbing arc so that
it will climb to the top of the rails more often? I'm guessing that
increasing
the air convection around the arc would help it to climb, so will
inclosing
it in a tall clear tube or box make a difference? Does the material that
the
rails are made of have any effect? How about the ballasting of the
transformer, as far as inductive or resistive, etc?
Thanks,
Tony Greer
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