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Forums
4hv.org :: Forums :: Tesla Coils
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12ft Tesla coil: Get yours NOW!!

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Shaun
Tue Aug 14 2007, 04:42PM
Shaun Registered Member #690 Joined: Tue May 08 2007, 03:47AM
Location: New Jersey, USA
Posts: 616
Hmmmmm, so if a 12 inch secondary gives me 500kV, then 12 12 inch secondaries in series should give me... 6 million volts!! At 1kV per mm, that's like 20ft arcs of lightning!!!!

See, this would not have happened if this poor, deluded fellow was a member of 4HV. By now he might have even cobbled together a working coil...
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ShawnLG
Tue Aug 14 2007, 04:56PM
ShawnLG Registered Member #286 Joined: Mon Mar 06 2006, 04:52AM
Location:
Posts: 399
OMG! He used over half of the spool! LOL. 5lb of #28 is 9945 ft. of wire.

Link2

"oh dear! What a waste..."
Think of the time he wasted winding that 12ft coil.
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GreySoul
Tue Aug 14 2007, 06:07PM
GreySoul Registered Member #546 Joined: Fri Feb 23 2007, 11:43PM
Location: Albuquerque, NM
Posts: 239
...hrm... I couldnt resist... I had to contact the seller and ask what was up.

I offered him $10 for the coil, NST, and stand...

Maybe I'll get lucky and win big!

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J. Aaron Holmes
Tue Aug 14 2007, 06:20PM
J. Aaron Holmes Registered Member #477 Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
GreySoul wrote ...

...hrm... I couldnt resist... I had to contact the seller and ask what was up.
I offered him $10 for the coil, NST, and stand...
Maybe I'll get lucky and win big!

Perhaps his "no way!" response will reveal how much *he* paid for the stuff. That could be just as entertaining cheesey

Cheers,
Aaron, N7OE
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Experimentonomen
Tue Aug 14 2007, 06:22PM
Experimentonomen Registered Member #941 Joined: Sun Aug 05 2007, 10:09AM
Location: in a swedish junk pile
Posts: 497
Haha:D
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ShawnLG
Tue Aug 14 2007, 07:10PM
ShawnLG Registered Member #286 Joined: Mon Mar 06 2006, 04:52AM
Location:
Posts: 399
I did some math to find out the resonant frequency of this coil in ideal conditions. The "Q" is really bad. The coil it's self has more surface capacitance than the topload.

Secondary inducance: 0.8H (Henries not MicroHenries)
Topload: 31pF
Resonant frequency: 31.9khz
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Myke
Tue Aug 14 2007, 09:48PM
Myke Registered Member #540 Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
suprised lol. Hmm... near audio resonant frequency Tesla coil. Wow 0.8H air coil.
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ragnar
Tue Aug 14 2007, 10:48PM
ragnar Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
wrote ...
"I don't have any pics of the coil running. It was not completed past the secondary and the stand. I did not have room for it and did not have good caps, transformer, and toroid. A coil with this many turns should produce extremely long streamers if tuned correctly. but will requir a powerful transformer to overcome resistance and a much larger toroid or sphere. as long as the winding is intact it should work if tuned right."

Sure...
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Coronafix
Tue Aug 14 2007, 11:57PM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
Oh My God!! Funniest thing I've seen in weeks.
11,500 turns!!!??!! The resistance alone in that thing would be extreme.
Without the secondary, $3200 seems a fair price for a 10.5kV NST and
that state of the art stand with primary. angry
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Marko
Wed Aug 15 2007, 01:11AM
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
BlackPlasma wrote ...

wrote ...
"I don't have any pics of the coil running. It was not completed past the secondary and the stand. I did not have room for it and did not have good caps, transformer, and toroid. A coil with this many turns should produce extremely long streamers if tuned correctly. but will requir a powerful transformer to overcome resistance and a much larger toroid or sphere. as long as the winding is intact it should work if tuned right."

Sure...

Blackplasma, how don't you understand.. more turns => bigger streamers cheesey

Huh!
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