>Ground resistance is not worth in such a conditions. Coil (or
>high voltage transformer) resistance is much grater anyway.
So, the coil losses decrease with it's L (assuming a given wire diameter, coil
diameter and spacing and so on) and thus it is good to decrease the needed L.
So we have to spend a high coupling capacity to ground (at the end of Pete's
inv-L) and thus it may be useful to spend a high metallic area to ground which
can easily be done by such a foil ;-)
BTW, i do not think that the resistive losses at the "ground coupling end" of
the inv-L would be reduced by lifting the foil some cm/inches above ground. The
E-field lines in this capacitor model (foil-soil) will have to pass the same
way.
Stefan/DK7FC
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