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4hv.org :: Forums :: General Science and Electronics
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Best use of 700 4,7nf 4kv caps

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kerver
Wed May 02 2007, 07:02AM Print
kerver Registered Member #522 Joined: Thu Feb 15 2007, 01:04AM
Location: The Netherlands
Posts: 33
What can i do with this?

Maybe a 9volt stun pen?

*mod edit- no pictures wider than 475 pixels*
*double mod edit- no pictures wider than 400 pixels*
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uzzors2k
Wed May 02 2007, 10:22AM
uzzors2k Registered Member #95 Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Are you sure they're not 4.7nF? They look a little small for 4.7µF... I used caps like that in my table top SGTC, and they worked fine. Maybe not ideal, but they will work. Or you could make a large MMC (multi-mini capacitor) bank out of them for a slightly larger coil. A Cockroft-Walton voltage multiplier? Excuse me for linking to Sam Barros. wink Link2
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kerver
Wed May 02 2007, 10:47AM
kerver Registered Member #522 Joined: Thu Feb 15 2007, 01:04AM
Location: The Netherlands
Posts: 33
472M is print on it
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ragnar
Wed May 02 2007, 10:52AM
ragnar Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
472 = 4700pF = 4.7nF
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kerver
Wed May 02 2007, 11:05AM
kerver Registered Member #522 Joined: Thu Feb 15 2007, 01:04AM
Location: The Netherlands
Posts: 33
Thanks blackplasma.
Im still a litle bit il, becouse whe had a big party here in this country called Queensday. haha
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Dr. Shark
Wed May 02 2007, 12:56PM
Dr. Shark Registered Member #75 Joined: Thu Feb 09 2006, 09:30AM
Location: Montana, USA
Posts: 711
First of May, we also have that smile

The stun pen would be cool but I don't suppose you have the required high voltage diodes?
Why don't you build a little Marx generator like Link2 It gives impressive results and all you need to add is a bunch of resistors. It has more advantages thatn taht in fact: It does not contain diodes with can fail, and you can have as many stages as you want and still get good performance.
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kerver
Wed May 02 2007, 01:07PM
kerver Registered Member #522 Joined: Thu Feb 15 2007, 01:04AM
Location: The Netherlands
Posts: 33
90 1n4007 1kv (not the uf vercie) diode's over here en 5 16khz hv diode's.
En some ccfl inverters, but the operate at 60khz with 12 volt input the give 1200v ac out.
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Proud Mary
Sat May 05 2007, 02:35PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
You could build a very handsome Marx with them. You could string them in series groups of three to get effective capacitance of about 1n5F at 12kV wkg per string, and use dome knuts as spark gaps, great fun.
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