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Forums
4hv.org :: Forums :: High Voltage
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My Jacobs ladder

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Patric
Tue Sept 06 2011, 09:46AM Print
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255

1315302241 2899 FT0 Jacobsladder


Remark the resistor to start the flame. It is 1 Mohm, 2 Watt.
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Ash Small
Tue Sept 06 2011, 10:11AM
Ash Small Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
That's pretty impressive. What's the base made from?
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Fraggle
Tue Sept 06 2011, 11:57AM
Fraggle Registered Member #1526 Joined: Mon Jun 09 2008, 12:56AM
Location: UK
Posts: 216
It just occurred to me that an electromagnet in series, configured to separate the electrodes slightly, might allow big arcs with reliable repetition. It would have to be cleverly made though, for all that voltage.
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Patric
Tue Sept 06 2011, 03:17PM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255
Ash Small wrote ...

That's pretty impressive. What's the base made from?

3 micro golf sec transformers in series (6300V) and one in series (prim) to soften the current.

http://www.youtube.com/watch?v=w3n8cSJskuE
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Alex M
Sun Sept 11 2011, 07:20AM
Alex M Registered Member #3943 Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Nice job! And very tall too.

Here is mine using a ZVS flyback driver as the power supply. I could sit and watch this thing climb for hours.

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Patric
Sun Sept 11 2011, 07:13PM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255
Very naais!
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Dr. Dark Current
Sun Sept 11 2011, 08:47PM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Nicely made.

Heres mine

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magnet18
Sun Sept 11 2011, 09:05PM
magnet18 Registered Member #3766 Joined: Sun Mar 20 2011, 05:39AM
Location: 1307912312 3766 FT117575 Indiana State
Posts: 624
Dr Kilovolt, what type of transformer is that?
And how is it resonant?
Capacitors?
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Dr. Dark Current
Sun Sept 11 2011, 09:15PM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
magnet18 wrote ...

Dr Kilovolt, what type of transformer is that?
And how is it resonant?
Capacitors?
It's a potential transformer, used for measuring HV transmission line voltage, this particular one is rated at phase-to-ground voltage of a 22 kV line but I'm powering it way beyond that. The resonance occurs between the capacitor bank on its output (30 microwave oven capacitors in series) and an inductor in series with the primary.
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GrantX
Mon Sept 12 2011, 02:41AM
GrantX Registered Member #4074 Joined: Mon Aug 29 2011, 06:58AM
Location: Australia
Posts: 335
Dr. Kilovolt, that is an absolute monster! I wish some decent transformers were available in Australia, I'm green with envy :p
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