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4hv.org :: Forums :: Projects
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Bipolar Marx

Author Post
Thu Mar 06 2008, 05:17AM Print View
Registered Member #1038
Joined: Mon Oct 01 2007, 08:02PM
Posts: 96
I built a Bipolar Marx generator.

I used caps from ebay: 15kv 2200pf ceramic.
For the resisters I used 3x300kohm 1w carbon film.

20 stages in one tower(the green one)
18 in the other (I killed two of my caps...)
input voltage is around 10kv

the sparks are about 30cm

sometimes they will go to 35cm


before potting in wax:

Some sparks:


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Fri Mar 07 2008, 05:54AM
Registered Member #1038
Joined: Mon Oct 01 2007, 08:02PM
Posts: 96
Man this thing is fun to play with,
just watching the corona fly in every direction in the dark is amazing.

I made another video of it:

I just laid the fluorescent tube on the HV+ wire from the flyback.
the glow longer when the marx fires.(from more current flowing through the wire when the caps are charging?)
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Wed Mar 12 2008, 02:06AM
Registered Member #1038
Joined: Mon Oct 01 2007, 08:02PM
Posts: 96

I somehow killed one of the towers(cheap Chinese caps...)
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Thu Mar 13 2008, 03:15PM
Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Asker, Norway
Posts: 1308
That's too bad, it was working good. I hope mine doesn't fail too, my caps are almost identical to yours.
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Thu Mar 13 2008, 07:26PM
Registered Member #1038
Joined: Mon Oct 01 2007, 08:02PM
Posts: 96
I think just one cap died, I can hear arcing sounds from it but I cant figure out which one its coming from.
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