[TCML] Climbing Arcs
teslas-intern at hotmail.com
Tue May 27 20:31:38 MDT 2008
I'm not sure if this is relevant to your circumstance but I built a
Jacobs ladder with an OBIT stack. One of my OBITs had a short on one of
the secondaries which caused the arc to climb faster on one side than
the other (the right side), when I replaced the bad OBIT, this problem
went away, and I could actually get the arc to sit at the top of the
rods if they were close enough together (and there was no breeze). Here
is a video of the faulty OBIT Ladder, you can see it twisting itself out.
I turn on the OBITs one at a time, hence the smaller arcs at first.
Once again, I'm not sure if this is your problem or not (probably not)
I'm also not sure why a short affects it at all. Perhaps somebody else
could shed some light on this mini-mystery.
Sfxneon at aol.com wrote:
> 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?
> Tony Greer
> **************Get trade secrets for amazing burgers. Watch "Cooking with
> Tyler Florence" on AOL Food.
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