The S meters on both indicated a strong signal. The signal is from a repeater a little over a mile away. The 710's signal was crystal clear hooked up to a J-pole inside my shack. The 6a HT had a very noticiable amount of background noise (white noise). Why wouldn't the 6a HT have a background-noise-free audio as well as the 710 mobile? Is there something that might not be set right? They were both on the precise same frequency, 146.925 MHz. Does this represent the typical performance difference between a mobile unit and an HT?