How is it possible to tune an antenna on the ground? John KK9A Al Kozakiewicz AB2ZY wrote: I have 3 antennas on a 10' mast sticking a total of 8' out the top of the tower. From top to bottom, 2M7, 6M3 and a C3, all equally spaced. All were tuned to resonance on the ground. Al AB2ZY