According to the Sherwood table, K2 # 1140 demonstrated 70 DB at 2 khz, while serial # 3160 posted 80 DB at 2khz, phase noise limited, actually better. Exactly what changes to the radio led to this improvement? I would like to be sure I have done the apprpriate mods to serial # 700 !!! 72 and HNY, Fred - kt5x