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Neil

Fri Nov 28 2008, 11:19AM

Registered Member #1458 Joined: Wed Apr 30 2008, 09:47AM
Location:
Posts: 51

Tom540 wrote ...

Neil wrote ...

aonomus wrote ...

Did you ever solve your capacitor problem or was your project a big bust Neil?

I decided to not risk wrecking the rest of the case from another cap exploding, I was lucky it was only the end piece of plastic, a few hrs and some plastic and it should fix up fine. Instead, I ordered the real deal from general atomics energy products (once maxwel I believe). A big pulse cap, 11kv at 525 uF, 125,000 amp rating. It just came into Australia this week after patiently waiting for the last 14 or so weeks for it to be made, should have it on my doorstep in this comming week. 100 kg of capacitor, very excited

Just curious, How much was it? General Atomics is right next door from where I work. I was thinking of getting a few things from them but everything looks so expensive so I never got any quotes.

It was $9,913 USD which was about $12,000 AUD for me with the exchange rate at the time. If you buy 4 or more, this price just about halves. Unfortunately for me, it was another $3,800 AUD to import it and pay frieght, tax etc on it so I just bought one. They seem very easy to deal with and I had no problems importing it for anyone else considering something like that.

Kizmo

Fri Nov 28 2008, 07:17PM

Registered Member #599 Joined: Thu Mar 22 2007, 07:40PM
Location: Northern Finland, Rovaniemi
Posts: 624

ZVS Explosion :)

sounded like .22 shot and pieces of mosfet casing were flying around my room

Chris Cristini

Fri Nov 28 2008, 09:55PM

Registered Member #1749 Joined: Fri Oct 10 2008, 02:04AM
Location: Claremont New Hampshire
Posts: 497

nice u know how i feel.

Turkey9

Sat Nov 29 2008, 06:05AM

Registered Member #1451 Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661

I was playing with a half bridge and thought that a couple 35v tantalums would probably work with a 33v non regulated supply..... small sizzling sound accompanied by a small plume of smoke.... turned off power, didn't find anything obviously wrong, and decided to fire it back up!!! sizzling sound again, and then a stream of sparks and fire shot by my face (which was about 4 inches from the caps....)!!!! hehehe wish i could've got a picture of that!

aonomus

Sat Nov 29 2008, 07:21AM

Registered Member #1497 Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801

Tantalums are like miniature hand grenades. They don't like overvoltage or reverse bias, infact, they hate it.

Tom540

Sat Nov 29 2008, 07:29PM

Banned on 3/17/2009.
Registered Member #487 Joined: Sun Jul 09 2006, 01:22AM
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Posts: 617

Neil wrote ...

Tom540 wrote ...

Neil wrote ...

aonomus wrote ...

Did you ever solve your capacitor problem or was your project a big bust Neil?

Just curious, How much was it? General Atomics is right next door from where I work. I was thinking of getting a few things from them but everything looks so expensive so I never got any quotes.

9,913 holy shit! I knew they were expensive. Was that one of their standard caps or custom?

jovica

Sat Nov 29 2008, 09:25PM

Registered Member #1790 Joined: Fri Oct 31 2008, 10:10AM
Location: Sydney, Australia
Posts: 40

Tom540 wrote ...

9,913 holy shit! I knew they were expensive. Was that one of their standard caps or custom?

I think they were custom made as he says.

' It just came into Australia this week after patiently waiting for the last 14 or so weeks for it to be made. '

Im not sure but if they were standard caps i dont think you would need to wait for them to be manufactured.

rp181

Sat Nov 29 2008, 09:44PM

Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529

nope, not custom, part number 33943.
These are big expensive products, it makes no sense to have them in stock. How many people but these? when these are usually bought, its larger quantity (like the navy's rail gun, they used capacitors from this company). Stock would just age them.

Chris Cristini

Wed Dec 03 2008, 05:38PM

Registered Member #1749 Joined: Fri Oct 10 2008, 02:04AM
Location: Claremont New Hampshire
Posts: 497

11kv at 525 uF, 125,000 amp rating. That's a huge cap certain death wow.

rp181

Wed Dec 03 2008, 09:42PM

Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529

not certain death, just hope it blasts your arm off first =/

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