RG-8/X (RG-8/M, RG-8 mini-foam) 100' 3.5 db attenuation (50% efficiency) @ 140 mhz 7 db attenuation (20% efficiency) @ 450 mhz 60' 2.1 db attenuation (79% efficiency) @ 140 mhz 4.2 db attenuation (62% efficiency) @ 450 mhz RG-8/U (Belden 9913) 100' 1.6 db attenuation (17% loss) @ 140 mhz 3 db attenuation (29% loss) @ 450 mhz cushcraft 27 element most directors are just under 10 1/4 " one is shorter and three are longer, near the end what model antenna is that from night owl?