> 
> Ok Alan, but what is the difference between a ground stake and the alu foil,
> when talking about the resistive losses? 

Ground resistance is not worth in such a conditions. Coil (or
high voltage transformer) resistance is much grater anyway. Thus 
use the single short ground stake and don't worry about it. It is
much worther antenna enviroment (trees, houses e.t.c.).

Regards,
Alexander/RA9MB