[TCML] My Hemisphere/Toroid with Unconnected Top Sphere results

[Peter Baitz <ussenterprisencc1701@xxxxxxxxxxxxxx>]

NOTE:   I'm moving this specific hemisphere/toroid with unconnected top sphere setup into it's own thread as a seperate topic from my original coil project topic which was more general to that coil build.   For knowledge sake, this is a 9kV 30mA 900 secondary turn 3.2" x 20", 8.7 primary turns, with terry filter coil.   

Hello Miles,

The original setup had a large 9.6cm circle of *no* metal foil on the top of the hemisphere creating a larger gap than the unit could bridge, so it arced through the plastic form about 5mm from the edge of the bare circle. (The foil tape is on the outside of the hemisphere form, and bottom inside edge where it connects with the toroid.)   While this created really great results in steamer length and tuning, I didn't want the arcing into plastic happening again, so I covered the top of the hemisphere in foil, then cut back larger and larger circles until at 6.8 cm it seemed to again try to arc into the plastic, but was very near the foil perimeter.  So I then added a 10mm flat washer with which to adjust the gap.  This seemed to work well a and would vary the time or effort it took for the sphere to break out in a single streamer, depending on pushing the washer a little closer in or further.  The toroid now fires steamers usually to startup (one, two
 sometimes three - some of which I attribute to my imperfect toroidal underside) the arc into the sphere begins, then the sphere fires a single streamer.      Again, 8.7 primary turns (I tried adjusting it but seems to be the right tuning.)   Some pics of the inter-sphere gap setup below.   Also want to stress that I do not get the same streamer lengths when the sphere is directly connected to the hemisphere as when the top of the hemisphere was completely covered in foil.   Neither when the top sphere is removed. 

<img src="http://i230.photobucket.com/albums/ee64/ncc1701_photos/tech/my_tesla_coil_hemi-toroid_sphere_GA.jpg";>

<img src="http://i230.photobucket.com/albums/ee64/ncc1701_photos/tech/my_tesla_coil_hemi-toroid_sphere-1.jpg";>

To me is seems like somehow the gap between the sphere and hemisphere allow the sphere to charge and put energy into the system without affecting the primary tuning (because when directly connected the output is not the same streamer length, neither whent he sphere is removed).   Additionally the modified setup depicted in the pics seems to allow me to control (or modify anyway) the time it takes for the sphere to break out itself, or how often if at all (roughly stated).     Hope someone can deduce what is going on??????   I really find this fastinating.  

Peter

PS: For reference to the coil build, see my website:
http://www.freewebtown.com/baitzobservatory/tesla/index.html


>Isn't that amazing. When it starts up the electrons are piling into the
>toroid and breaking out like a toroid, then the inter dome spark starts up,
>so now the electrons have a path into the sphere, then the sphere sort of
>takes over, and you can see the serpent. Your tuning sounds very good, and
>you are getting proper looking streamers now. The two from the toroid is
>correct, and the one from the sphere is correct. Your output is quite good
>for a 30ma transformer. You can also see the topload change dominant parts
>and the toroid sort of takes over and then shifts back and forth with the
>sphere.
>
>buildingthefuture@xxxxxxxxxxxxxxxxx





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