[TCML] My Hemisphere/Toroid with Unconnected Top Sphere results
Weinhold Shannon L
Shannon.L.Weinhold at doc.state.or.us
Wed Sep 9 19:42:02 MDT 2009
I think I know what you're seeing here.
I stumbled upon something similar a while back and found it to make pretty dramatic effects, more so than typical haphazard streamers chaotic leaping about.
What I did was place a vase (glass tube about 12" long with a flat base) on top of my 12" topload sphere (its an IKEA, so it has a small flat spot on the top...convenient for testing different breakout points) and on the top end of the vase I placed a 16" sphere.
All of the arching from the topload are pulled to this insulated sphere, and the arching is much more intense than normal. The color and feel of the arching is totally different. Strangely, The larger sphere doesn't appear to charge up. It seems that it would act a bit like a VDG in that it would store up a charge and hold it after the coil is turned off, but it doesn't.
Anyway, the discharges are impressive and overall it is a cool phenomenon to behold.
Ever try running a wire from your coil?
You can make shapes with the wire and charge them up with a bright purple discharge all along the wire. Put those old glass insulators to good use...
You will have to retune your coil to deal with the extra capacitance, but it is another fun phenomenon to experiment with.
"Failures are divided into two classes
those who thought and never did,
and those who did and never thought."
John Charles Salak
From: Peter Baitz [mailto:ussenterprisencc1701 at rocketmail.com]
Sent: Sunday, September 06, 2009 3:10 PM
To: tesla at pupman.com
Subject: Re: [TCML] My Hemisphere/Toroid with Unconnected Top Sphere results
This thread was meant to move the specific discussion on the hemisphere/toroid combination unit with top sphere, from the original build thread "My first tesla coil" to here as a seperate offshoot topic. Based on what you stated, it doesn't sound like you saw those beginnings. So I will restate in brief the whole thing here. There is a reason for the top sphere not being directly connected - more below.
Essentials are that I finally build this combined 11" diam. hemisphere plus toroid underside top load. The hemisphere is a plastic form the outside of which is covered smooth in metal foil tape and the bottom inside edge also with metal foil tape (wrapped around the bottom edge connected with the outside surface, and an metal duct toroid shoved carefully in the bottom, then the outside edge meeting joint between the hemisphere and toroid covered with metal foil tape. Now the plastic form had a flattened area on the zenith/top section with a hole in the top, so I did not cover that area in foil on first testing.
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