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4hv.org :: Forums :: Projects
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Diable Tonnere – my latest project.

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Daniel Uhrenholt
Tue Oct 12 2010, 09:56AM
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
Hi Steve,

Yes, I use the white Semikron SKM400GB124, they are extremely robust, ultra fast, and are easy to drive. The IGBT`s in the coil ran for 3 months 4 times per hour, 15 seconds each time, 8 hours a day at 360V 600 Amps last year. That`s 12 whole hours on pulsed mode.

I think that they are worth the price:-)

Didn`t you use the same bricks for something in the past?

Cheers, Daniel
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Steve Conner
Tue Oct 12 2010, 10:26AM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
I had the SKM400GB123D, but I sold them to Marko. They're a bit slower than the 124 series, but Marko now has no excuse. smile

Did you buy yours new? The 124 series is a newer generation and I haven't seen them on the surplus market.
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Dalus
Tue Oct 12 2010, 07:37PM
Dalus Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
Awesome looking coil Daniel. Let's hope it'll be throwing arcs for some long distances and for a long time to come smile
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Finn Hammer
Tue Oct 12 2010, 09:01PM
Finn Hammer Registered Member #205 Joined: Sat Feb 18 2006, 11:59AM
Location: Skørping, Denmark
Posts: 741
Steve McConner wrote ...

Yeah baby! :D

That stuff is "Ultrarib" sewer pipe.


You bet! Ribbed for your pleasure wink

Cheers, Finn Hammer
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Coronafix
Tue Oct 12 2010, 09:08PM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
Finn Hammer wrote ...

Steve McConner wrote ...

Yeah baby! :D

That stuff is "Ultrarib" sewer pipe.


You bet! Ribbed for your pleasure wink


Does it make your coil more sensitive?! suprised
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Steve Conner
Wed Oct 13 2010, 09:18AM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
If the ribs didn't do it for you, I'm sure the 500,000 volts would. suprised tongue
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Dalus
Thu Oct 14 2010, 08:03PM
Dalus Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
It's one hell of a toy, that's for sure cheesey
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Daniel Uhrenholt
Tue Oct 19 2010, 08:49AM
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
Steve,

I didn`t buy them used, but from a guy in Denmark who had them in the original box for a fair price smile

I`m having some problems with the coil at the moment, the spark output is falling drastic and is now just around 2 meters. I think that I need a new and better cap that can take some more RMS current, as the one that I have now only can take around 100A. And a new bus cap made from some large RIFA caps that I`m looking at... Finn and I took a cap out of the mmc, and unrolled the film and isolation layer to see if the cap was dead, but it had almost no self healing spots.

One headache just takes on another, and this may take some while before I can finish it... And there is getting cold outside, so there will be no coiling for the months to come...

I`m also making a new MIDI interrupter with a friend of mine at the university, but more info on that later smile

Cheers, Daniel
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