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[moved] 24,000j Capacitor Bank (Now Complete)

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FastMHz
Mon Aug 04 2008, 05:05PM
FastMHz Registered Member #179 Joined: Thu Feb 16 2006, 02:08AM
Location: Hagerstown, Maryland - Close to Prime Outlets
Posts: 287
I've been dabbling in coin (and other object) shrinking. Unfortunately repeated 20kj+ discharges have vaporized the screw holding the left knob in the spark gap...it just fell off, and needs repairs.
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Tesladownunder
Mon Aug 04 2008, 06:08PM
Tesladownunder Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
I would be surprised if you got good results with coin shrinking. The rate of current rise will be very slow with electrolytics.

Here is what I get at 5kJ with a 1 yen coin.

TDU


1217873138 10 FT32933 Coinshrinkingyen5kjflipside
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Ken M.
Mon Aug 04 2008, 09:08PM
Ken M. Registered Member #618 Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
What a waste of 1 good yen..BTw whats 1yen worth in Aussy cash?
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rp181
Tue Aug 05 2008, 12:42AM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
from google:
1 Japanese yen = 0.009248 U.S. dollars

i dont know what "aussy cash" is =)
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FastMHz
Wed Aug 06 2008, 03:51AM
FastMHz Registered Member #179 Joined: Thu Feb 16 2006, 02:08AM
Location: Hagerstown, Maryland - Close to Prime Outlets
Posts: 287
That looks like it shrunk a LOT at 5kj....why wouldn't I get even smaller with upwards of 24kj?

Tesladownunder wrote ...

I would be surprised if you got good results with coin shrinking. The rate of current rise will be very slow with electrolytics.

Here is what I get at 5kJ with a 1 yen coin.

TDU


1217873138 10 FT32933 Coinshrinkingyen5kjflipside

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EEYORE
Wed Aug 06 2008, 06:24AM
EEYORE Registered Member #99 Joined: Thu Feb 09 2006, 06:10PM
Location: florida, usa
Posts: 637
Your peak current will not be as high with those lytics as it is with pulse caps.
matt
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Electroholic
Wed Aug 06 2008, 07:16AM
Electroholic Registered Member #191 Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
need more di/dt.
also the japanese coin is made of Alu.
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Ken M.
Thu Aug 07 2008, 12:41AM
Ken M. Registered Member #618 Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
3 yen= .05 in Austrailian currency
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FastMHz
Sat Sept 13 2008, 05:32PM
FastMHz Registered Member #179 Joined: Thu Feb 16 2006, 02:08AM
Location: Hagerstown, Maryland - Close to Prime Outlets
Posts: 287
I have built a new spark gap, and the system is now back in action!!

I've also built what I've intended to use this massive bank for in the first place - a giant pancake coil. The actual coil is 11" in diameter and 1/4" thick, made with flat wire. I used the same technique to make this one as I did for my smaller ones, it just made me sweat a lot more pulling that thick wire.

I've also added supports to the bank so that I can move half of it at a time, making it much more portable. I can load it into the back of my pickup and do experiments in a field now.

I should be able to send some rather large chunks of aluminum flying with this one. I'm going to attach a supportive base and some connectors and begin testing at lower energies soon.
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FastMHz
Sun Sept 14 2008, 04:50PM
FastMHz Registered Member #179 Joined: Thu Feb 16 2006, 02:08AM
Location: Hagerstown, Maryland - Close to Prime Outlets
Posts: 287
I have tested the new coil, and am astounded at what I saw. At only 300j, which is 500v in my bank, a 3 foot by 1 foot, 1/8" thick sheet of aluminum flew half way up to the garage ceiling!!!

Here's the coil (Pic Link)!!
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