i can't see any planes landing 30 kms away but i am at 400 meters above the airport, maybe the lobes of the aerial do not point down, try removing the plate or changing orientation of the aerial i can see differently if i put it horizontally get it high and you will get lightning struck easier.. i burnt a pcr 100 with lightning since then i keep my aerials low and must be content with that. i have had a strike this year too, burnt all my telephones and modem
cheers
frank 35 kms nw of liee