What is the opinion of a pair of crossed 160m 1/2 wave dipoles 21' off the ground? The antennas would be arranged along geographic N-S and E-W. The center would be supported by a 21' tower and each end would be supported at 21' as well. The dipoles will be made from 3/16" galvanized cable. Any ideas or input? Kurt Rosetta Proving Ground, Nevada Hell's Laboratory