[TCML] RE: longer sparks?

[Etienne Dreyer <chemistets@xxxxxxxxxxx>]

Hi gang, 
I've just completed a coil, but am not getting the spark lengths that I expected. I am only getting weak 20" max, whereas I saw from sites like loneoceans and greg's garage tesla that TCs very similar to mine easily make 3ft and beyond. Could you guys give some suggestions on what I could do to get longer sparks? Here are some of my specifications:
It is tuned
Dual mot with voltage doubler
4" x 18" (actual coil length) secondary wrapped with 26AWG
10 turn primary
45nF @ 20KV capacitor
It is not well grounded- simply a sheet of aluminum foil on the ground
It does not have a very large toroid - 3" air duct with diameter of 13"
Single static spark gap (I'm going to upgrade to a ARSG)
Could the latter three issues be making such a big deal?
Very much appreciated,
Etienne

 
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