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Forums
4hv.org :: Forums :: Tesla Coils
« Previous topic | Next topic »   

Who need balls? :-)

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Patric
Tue Jul 12 2011, 04:21PM Print
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255
Found in a pet shop in Belgium, Astene... beautiful balls to use as top-sphere on a Tesla transformer. 15€ for about 15 cm ( 6 inch) diameter.
1310487689 2899 FT0 Dva
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Killa-X
Tue Jul 12 2011, 04:36PM
Killa-X Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
Nice find, best luck I had here was finding 12" diameter styrofoam balls and smaller. Just means you have to put aluminum tape on it, big deal, point is its a near perfect sphere for cheap cost to make a topload perform just as any aluminum one would.
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Mads Barnkob
Tue Jul 12 2011, 07:58PM
Mads Barnkob Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
They are known as gazing balls to put in garden ponds.

They can be found cheap on ebay
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RogerInOhio
Wed Jul 13 2011, 01:40AM
RogerInOhio Registered Member #1034 Joined: Sat Sept 29 2007, 12:50PM
Location: Chillicothe, Ohio
Posts: 154
What are they made out of ? I don't like the glass ones very much.
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Patric
Wed Jul 13 2011, 06:15AM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255
They are made of inox, they are just a little bit magnetic.
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Mads Barnkob
Wed Jul 13 2011, 07:09AM
Mads Barnkob Registered Member #1403 Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
The gazing balls i have seen are made of stainless steel
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Patric
Wed Jul 13 2011, 10:48AM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255
In metallurgy, stainless steel, also known as inox steel or inox from French "inoxydable", is defined as a steel alloy with a minimum of 10.5 or 11% chromium content by mass. So they are high quality!
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Ash Small
Wed Jul 13 2011, 01:33PM
Ash Small Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
I have one that I believe is 300 series austenitic stainless steel, which is not magnetic. I think it is 316, if I remember correctly, probably 316L.
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Patric
Wed Jul 13 2011, 06:06PM
Patric Registered Member #2899 Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255
Can the material of the ball be of influence on the Tesla coil?
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