I have a cb radio acquaintance that installed some sort of base load.(coil) to the base of his Imax 2000 antenna. If all is told correctly, There was no other mods. His signal doubled at my station on several different test and or conditions, Maybe 30 miles away as bird flies. He has no paper-work All I can find is a Siro that sounds sorta like it. Sure would appreciate any and all advice on such an item, if available...Thanks ...Jim