i got a discone antenna. bout 8 years old (when i joineded maybe) on roof on a 100 ft line i guess. just scanning locally in newark nj about 2 miles from airport straight line. wanted to get more DISTANCE on receiving. should i RAISE antenna? its about 8 ft on highest point on 45 ft roof. house on left,right and rear are taller then antenna. bc355n i use. i did own a uniden digital...on antenna which reached i-95 along FAR side of airport. MAYBE IM FINE but is higher better? mines antenna has i THINK center whip 20 inches maybe or better and those 4-5 going around it on bottom. txs all in advance....nice scanning again.