I have tried 4 different antennas on my IC-R8600 and the same antennas on the AOR 8600 Mk2. (Two of the antennas are identical) All four antennas receive well on the AOR but none of the antennas perform very well on the IC-R8600. In the video example, both the AOR and the Icom have the same frequencies programmed into their memory. I'm unsure as to why the AOR is far more sensitive to receiving weaker signals that the Icom doesn't stop on. It seems as if the Icom only stops to receive stronger signals. I have seen the Icom stop on a frequency but the signal meter doesn't register any signal strength at all; however, the AOR receives the same signal with it's signal meter pretty much full up.