Hi Daniel, Thanks for your repply !
Ok on the radials ground system, but do we have to put radials for each monopoles or not ? i've already seen a draw showing a half square with radials for each monopoles
I 've already seen stations who were using Half Square without radial but it 's certainly not the best choice
I have a 2 elements vertical array on 40M i'm not sure if the result will be better with such an antenna (the Half Square)
I'd like to thank Kim, i 've just received his Email, i'm going to read it carefully ;-)
73 to all and Good DX