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4hv.org :: Forums :: Projects
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"Thumper"

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Daniel Uhrenholt
Sat May 15 2010, 08:11AM
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
I didn`t see your post Mads.

We can arrange a little Danish Thon this summer:-) Be sure to bring a coil or two, I will find a place where we can make sparks all day long!

Cheers, Daniel
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Mads Barnkob
Sun May 16 2010, 09:56AM
Mads Barnkob Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
Daniel Uhrenholt wrote ...

I didn`t see your post Mads.

We can arrange a little Danish Thon this summer:-) Be sure to bring a coil or two, I will find a place where we can make sparks all day long!

Cheers, Daniel


Got my VTTC and SSTC3 that lives, the SSTC2 is dead for the moment, a primary flashover killed some windings on the secondary :(

A weekend would be the best for me, all vacation is already booked up :)
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Dalus
Thu May 20 2010, 07:57AM
Dalus Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
Monday was a bit more busy then expected frown First year at the uni also sucks up time rather fast. So I didn't get the copper busbar done. But I did take a pic of how things look now. Think you can allready guess how the busbar will look from the picture.

52

Don't know when I'll have time to get working on the copper again. Lots of stuff to do and some problems at home that need my attention.
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Finn Hammer
Thu Jun 03 2010, 10:45AM
Finn Hammer Registered Member #205 Joined: Sat Feb 18 2006, 11:59AM
Location: Skørping, Denmark
Posts: 741
Generous fillets applied to all, otherwise protruding, corners, are the trademark of a CNC machined product.
But I don't have that, so my fillets are applied, retrospectively, the good *old school* way.
This is how it is done:

1275559584 205 FT68820 Fillets


A suitably radiussed backup slug, the descent of the file is effectively controlled.

I want safety, but I don't want to be soldering all night.
When looking at soldering 200 bleeder resistors, a down and dirty solder jig is mandatory.
Shut up, get done with it, and solder!

1275559895 205 FT68820 Solderjig


2 x 10M for a 30sec time constant, going easy on the Q tongue

And finally some CAD porn: Huwow, a lot of hours must have gone into that!

1275560071 205 FT68820 Udklip1


I am about ready to apply Conducto Lube to the mating surfaces of the sliding Pulsed Kiloamp connections, and am modestly proposing first light this first coming Sunday.

Cheers, Finn Hammer
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Coronafix
Thu Jun 03 2010, 12:23PM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
Beautiful work Finn, especially the radiusss.
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Finn Hammer
Thu Jun 03 2010, 08:40PM
Finn Hammer Registered Member #205 Joined: Sat Feb 18 2006, 11:59AM
Location: Skørping, Denmark
Posts: 741
Coronafix wrote ...

Beautiful work Finn, especially the radiusss.

Thanks, Coronafx

And now the circuit is closed, just waiting to get pulsed by the motor

cheesey

1275597404 205 FT68820 Circuitclosed1

shades

1275597444 205 FT68820 Circuitclosed2

amazed

Cheers, Finn Hammer
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Dalus
Thu Jun 03 2010, 08:52PM
Dalus Registered Member #639 Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
Have fun powering this beast up. And keep us posted.
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Coronafix
Thu Jun 03 2010, 10:59PM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
You'll probably want to keep changing toploads on it so you can keep tuning it. :)
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Finn Hammer
Fri Jun 04 2010, 05:09AM
Finn Hammer Registered Member #205 Joined: Sat Feb 18 2006, 11:59AM
Location: Skørping, Denmark
Posts: 741
Coronafix wrote ...

You'll probably want to keep changing toploads on it so you can keep tuning it. :)

Actually, I doubt the topload is going to be changed, unless I can muster enough gumption to make a larger one. shades

The reason that I made the cap configurable is, that I want to be able to search for a possible sweet spot, where the L/C ratio is different. Like, better sparklength/pri_current ratio

Wow, now so close to the moment where i watch the scope, while sweeping past the sweet spot, recording it for you all to see.

Cheers, Finn Hammer
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Daniel Uhrenholt
Fri Jun 04 2010, 06:05AM
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
Nice work Finn,

I can`t wait until Sunday, where we will see if all of this hard work works as we planned:-) Yesterday I soldered the last PCB for the motor controller, so this afternoon I will write the last code for it...

See you Sunday!

Cheers, Daniel
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