My situation is this, My antenna is attic mounted, best I can figure 4 miles from Las Vegas airport and 15 from Nellis AFB. I've tried the RS 20-176 and also the RS 20-043. I'm waiting on delivery of the antennacraft ST-2. Results are strange, the 20-176 is better at picking up The Las Vegas ground/tower side of transmits and outstanding at picking up the aircraft transmits however the 20-043 is deaf on the tower side of the conversation? I can pull in Nellis just fine but after a little research I fond I am 175' above Nellis in elevation which might explain my better reception. Am I alone in thinking the ST-2 will solve my deaf zones? Any help on this??? Don.