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4hv.org :: Forums :: High Voltage
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I built a jacob's ladder

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Tetris
Sat Sept 03 2011, 11:00PM Print
Tetris Registered Member #4016 Joined: Thu Jul 21 2011, 01:52AM
Location: Gainesville, FL
Posts: 660
7500V 30ma NST. I found the wire when I was going to the bus from school. I think its a part of fencing. :P its my first working HV thing. (I mean, if you do not count the tranny itself)

SLOW MOTION!!!

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Marko
Sat Sept 03 2011, 11:53PM
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Hi,

One warning that I generally post is to never ever use wood as a HV insulator as this can result in unfortunate fires. Even if it's dry enough that it seems to hold out, it may be draining significant current off your nst.
A jacob's ladder will work just as well if mounted directly to the ceramic insulators on the transformer.

Marko

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Tetris
Sun Sept 04 2011, 01:18AM
Tetris Registered Member #4016 Joined: Thu Jul 21 2011, 01:52AM
Location: Gainesville, FL
Posts: 660
people have told me not to do just that though!
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Mads Barnkob
Sun Sept 04 2011, 07:18AM
Mads Barnkob Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
HighVoltageChick wrote ...

people have told me not to do just that though!

Nice Jacobs ladder, they are lovely when they self ignite and keep running over and over :)

What were their arguments for not mounting the wire directly on the transformer? Marko is right about wood being a conductor that eventually can create a carbon track that all the energy will flow through and thus burn. Nothing wrong with wood, just isolate your current flow from it.
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the mad scientist
Sun Sept 04 2011, 06:20PM
the mad scientist Registered Member #3768 Joined: Tue Mar 22 2011, 12:46AM
Location:
Posts: 107
suggestion :3, try to straighten out the kinks in the jacobs ladder so the arcs can climb easier :)
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Marko
Sun Sept 04 2011, 07:18PM
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
HighVoltageChick wrote ...

people have told me not to do just that though!

Hello,

Well it's not the best solution I admit as it increases the possibility of tearing off the insulators by accidentally bumping the ladder, but it seems like the simplest thing to do if you don't have any proper insulators around.


Marko
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magnet18
Sun Sept 04 2011, 07:39PM
magnet18 Registered Member #3766 Joined: Sun Mar 20 2011, 05:39AM
Location: 1307912312 3766 FT117575 Indiana State
Posts: 624
Yea, wood can burn, especially if connected to a spark gap :P
Now I'd recon you need a nice high voltage capacitor :)
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