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

[Mddeming@xxxxxxx]

Hi Peter, 
    With the sphere isolated, you have a large  capacitor on top of your 
TC, with the sphere being one plate, the  hemisphere-toroid combination being 
a second plate, and the ground being the  third plate. This is in parallel 
with the internal capacitance of the secondary  giving the total effective 
secondary capacitance. Evidently, this combination  tunes well with your 
primary, so despite the internal arcing between the  "plates" you get a better 
result. When the two are in electrical contact,  you have essentially one fat 
top plate and a different capacitance, meaning  it is again mis-tuned and 
results go down. There is a good bit of  anecdotal evidence that very good 
results are obtained when C(topload)  >= C(internal). Of course, calculating 
the capacitance of any but the  simplest shapes is non-trivial.
 
Hope this helps some,
 
Matt D.
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