DRSSTC VI / Tesla Coils / Forums

Forums

4hv.org :: Forums :: Tesla Coils

« Previous topic | Next topic »

DRSSTC VI

previous 1 2 3 4 next

Move Thread

LAN_403

Phillip Slawinski

Tue Jul 17 2012, 11:26AM

Registered Member #1732 Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112

Kizmo wrote ...

Great job Philip! :)

Gotta love that enormous pile of MMC you got there. Thats the way to go! There is absolutely no way one can overheat mmc like that

How high bus voltages are you using?

Quite a "pile" of MMC caps it is. The MMC consists of seventy-five capacitors in total. When you're spending this much time and money on a coil, it's best not to fool around trying to just scrape by. Indeed, this MMC is nearly bullet-proof. At the maximum of 3kA the peak voltage that the MMC sees is just below the AC rating on the caps (granted, that is a 60Hz AC rating).

We usually run between 700V and 800V on the bus. The bus capacitors are only rated for 840VDC, so 800V is the limit.

nixie

Tue Jul 17 2012, 03:33PM

Registered Member #3908 Joined: Tue May 24 2011, 09:40PM
Location: Gilbert, Arizona USA
Posts: 68

Hi Phillip!
I believe you have set a new goal for others to achieve with your stunning work of art. Clearly in the same league of your MPTCC.
And I imagine the doubler construction is just as meticulous. Maybe even including a smart auto-precharge circuit.

Congratulations! Hopefully your neighbors are friendly and supportive!

Regards, Jeff

Phillip Slawinski

Fri Jul 20 2012, 03:40AM

Registered Member #1732 Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112

We ran the coil tonight, and finally started pushing it. We managed to get 16' 4" out of it, and then we had to pack it all up. Looks like it could still do more.

HV Enthusiast

Fri Jul 20 2012, 04:14AM

Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068

Gorgeous! The coil is beautiful, the performance outstanding, and the photography is top notch too!!!

Steve Ward

Sat Jul 21 2012, 04:00AM

Registered Member #146 Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055

Its pretty nice and all, but its really hard to see the lock-washers in the bridge exploded view... maybe you can work on that.

Just messing with you, of course. Obviously you did a superb job, and i know there is more to come!

Im very impressed with the spark length to toroid size ratio here. I wonder how much further it might be able to go?

Also noticing the 16 footers are much dimmer than the ground strikes. I do wonder how much the resistance of the brick post matters, or if its simply reaching the impedance of the arc that limits the discharge current, and hence brightness. Id have to think a bigger toroid might "fix" that.

StRyKeReYe

Sun Jul 22 2012, 05:02AM

Registered Member #5777 Joined: Tue Jul 17 2012, 03:34AM
Location: Moulton Al
Posts: 3

I wondered about the Streamers too, I was noticing that when it went to Jack Hammering on the Concrete that they instantly became fatter and brighter, but at almost near the same time any branches that were not to ground also seemed to increase in Luminosity I'd like to look at the video again frame by frame to see.

As for a bigger Toroid are you going to let Phillip borrow Gigantors?

Mads Barnkob

Sun Jul 22 2012, 08:00AM

Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968

Beautiful coil, great craftsmanship there :)

Phillip Slawinski wrote ...

The toroid is not spun, it's a foam core with Aluminum tape wrapped around it.

Could you please detail on how you made the foam core, smoothing, adding tape to be as smooth etc.

Phillip Slawinski

Sun Jul 22 2012, 07:52PM

Registered Member #1732 Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112

Mads Barnkob wrote ...

Could you please detail on how you made the foam core, smoothing, adding tape to be as smooth etc.

I didn't actually build the toroid. Cameron Prince did. As I recall he had the foam core made by a company, and then shipped to him. He then applied the tape strip by strip, and used some sort of roller to ensure that it was smooth.

Matt Edwards

Mon Jul 23 2012, 07:46PM

Registered Member #2838 Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333

Looks familiar ;)

Phillip Slawinski

Tue Oct 16 2012, 03:59AM

Registered Member #1732 Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112

We ran the coil again this past weekend, and got even better results. 16' 9" (measured). We had to stop the run when the primary supports melted down!

In the video below, the breakout point is about 11 feet above the ground. The distance from the end of the breakout point to the post is 16' 9".

previous 1 2 3 4 next

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob