President Andy2 with KL 203p amplifier,45° center fed sloper dipole antenna, 8.3 inches per leg. positive leg up at 14 ft. , negative leg down to the ground 2 ft off ground. I have SWR of 1.1 and 1.3 moving radio shack to a different room I need 75 feet of coaxial cable going from my radio to my center fed pole connection, the hard question is DO I HAVE TO use LMR 400 or can I get away with the RG8 X coaxial cable ,is 75ft run to long??? I've read that that LMR 400 is better with power loss due to the length of the runs. Is this true? If I can get away with the RG8X , it's half the price Thanks for all your help and suggestions 73