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

[Peter Baitz <ussenterprisencc1701@xxxxxxxxxxxxxx>]

Hello Bart,

Here's the calculation results done with deepfriedneon.com calculator for my coil, and toploads
I'm experimenting with.   As you can see if the sphere is directly connected metal-to-metal
to the secondary output like the hemisphere/toroid, or sitting atop but connected to the 
hemi/toroid (other than with a coil of wire or tubing or isolated) technically the topload capacitance
does change, like the following chart.   I am fairly convinced when it sits atop but is
unconnected, or connected through a coil or wire or tubing (forming a type of 'magnifier')
the topload remains that of the hemi/toroid for which my primary turns calculation comes
out to 8.8 turns, and it does work at 8.4-8.8 turns.   

------------------------------------------
Using 9.822 mH self inductance, and 7.197pF (0.000007197uF) self capacitance plus the topload.

6" sphere alone 8.551pF (0.000008551uF) res. freq. is 404.676 kHz

11.125" 'hemisphere/toroid' alone 14.116pF (0.000014116uF) res freq. is 347.854 kHz

Hemi-toroid plus sphere 22.667pF (0.000022667uF)  res freq is 293.864 kHz

------------------------------------------

6" sphere alone
7.65 turns

11.125" hemitor (hemisphere-toroid) alone 
8.8 turns

Hemitor (hemi-toroid) plus sphere (physically connected metal to metal) 
10.3 turns (in actuality this needed a bit less) 
----------------------------------------------------

So it appears to me the top sphere does change the topload capacitance
when directly connected, but not when unconnected or through
a tertiary coil - and in the latter two cases acts as a special case
"magnifier" without affecting the top load (hemi-toroid) capacitance. 
Just some observations based on behavior of my tesla coil, and compared
to tesla calculator information.  I could be wrong, still open to thoughts. 

See website updates for Sept. 9 and 10 with regard to this third coil
which I found well replaces the isolated/unconnected original sphere
on top of the hemi/toroid situation.    

http://www.freewebtown.com/baitzobservatory/tesla/index.html

Peter

PS: I am hoping as another next step to build a second spark gap that is adjustable so I can work with it a little.     My current 6-gap spark gap is fixed with total space just
a little less than my safety gap size, and works quite well, but will try for a better one. 
I may hook up a vaccum to the new one, not sure yet.   I'd really hate to have a vacuum noise running too, LOL.   






>>>------------------------------I haven't been keeping up well with these posts, but regarding top load 
C, I just wanted to point out that the top sphere adds only a slight 
increase in C. Roughly, the hemisphere is about 12pF. Putting the 6" 
sphere on top results in the neighborhood of 13.7pF overall. As you can 
see, only a slight top load change and very small Fr change. The 
interconnect coil adds nothing. So the system should remain well in tune 
in all cases.
Take care,
Bart
>>>-----------------------






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