My Friend just put up a tower aprox 50 Ft. with an Imax-2000 on top. The coax is new 9913 the radio is low power Am 11 meters or a mobil cb,power-supply power mic no amp as of now. In tuneing he had swr problems that could not be adjusted at the antenna. with several attemps at the antenna..Had a local teck come over with antenna analizer and Swr equipment and the end result was to add ( and dont quote me I forget how long) but like 80 ft of coax. everywhere I read you can not change your Swr by the legnth of coax. I read to add a balun of 6 to 8 turns and about 8 ft total at the antenna base. Was asking what is the best thing to do seems like a lot of coax 185 total legnth and he wants it in one full legnth from meter to antenna. I also think his highest swr is 1.5 to 1 on 40 chanels he is also thinking of buying an export that is why he thinks his match is an issue.