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Re: the geek group

Original poster: "Christopher Boden by way of Terry Fritz <twftesla-at-qwest-dot-net>" <chrisboden-at-hotmail-dot-com>

>Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
>The geek group website is down and I was trying to contact them,
>unsuccesulfully, in order that I could buy a 100 of the .15 2kv cornell
>dublier capacitors.
>-Max Joseph

Just email to the List and I'm guarenteed to see it :) I read almost every 
post, every day.

The website is *supposed* to be up tomorrow, but there's a running bet on 
that. ISERV (our former ISP) is being a serious pain about transferring the 
domain to us, they'd rather overcharge our account again. The new site is 
fantastic, completely recoded, in Dreamweaver and Macromedia Shockwave and 
Flash. We've been working on the new site for 3 months! and it's still not 
complete, but it's quite functional. The new site will have the complete 
15GB C.A.R.M.E.N. Archives, and TONS of Tesla Coil and other High Voltage, 
High Energy info.

In other News.

Mark came out for the weekend and we had a blast. We had Mark, Alia, Tink, 
Tim, Ben, Mini-Me (Little Chris), and Myself all stuffed into Little St for 
4 days. I'm happy to have my little 600SqFt apartment not littered with 
bodies sleeping everywhere again.

Over the weekend Mark Broker (Geek#10) worked his butt off on the Thumper 
project. We now have a small (if you can call 1.7kJ small) module prototyped 
and functional. It sounds like a quarter stick of dynamite going off and you 
can feel the shockwave in your chest 30' away across the room. We tried Can 
Crushing (with moderate success) but found Can Exploding MUCH more fun :). 
We learned quite a few things about cap-discharge setups.

1. We need some 30A diodes.
2. 4 caps (each cap is 450VDC 2000uF Electrolytic Cornell Dubilier computer 
grade) sound like a 9mm when discharged across a wire.
3. 30 caps make a BRING flash, shockwave, and loud bang, and shred a Sprite 

We also worked on Sam a bit. With a large (think the furnace in your house) 
Squirrell Cage blower on Crap-Gap-III the coils performance improved 
markedly. We are getting consistant power-arcs to a grounded rod 51" away.

It still sucks, but it's getting better.

There was much rejoiceing Saturday evening and now we have 2 cases of Mikes 
Hard Lemonade bottles to make some more SW caps. I love the MMCs, don't get 
me wrong. But for testing of high power systems I'd rather destroy $20 worth 
of bottles than risk $500 worth of caps.

We also took a few dozen pics of our other goodies for sale. some of which 

4 large switches/breakers, each 3 pole, rated 600VAC 400A
Several X-Ray transformers, varying sizes.
Some BEEFY power supplies and such.
X-Ray tubes, complete, some with housings/cooland tubes,etc
and various other goodies. If you're looking for something let me know.

I'm looking for help on a triggered spark gap that can handle some MASSIVE 
current for the Thumper project. Basically I need a resetable crowbar for a 
50kJ cap bank. The downside is I need it to work at as little as 400V. This 
is impossible in a spark gap as far as I know, ideas?

Have Fun campers


Christopher A. Boden Geek#1
President / C.E.O. / Alpha Geek
The Geek Group
Because the Geek shall inherit the Earth!

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