I am putting up a hygain 105ca, a c3i c7-50 (7 elements 50 mhz) and a c3i fo19-144 ( 19 elements horizontal 144 mhz) on the tower this weekend. My question is how far apart do these antennas need to be so as not to interact with each other(at least as little as possible). The antennas will be on a 21 foot mast atop a 125 tower. Thanks, Joe N4JBK