Just can not get the forest service with a nice clear sound. I know their radio system is poor . Just comes in fuzzy at times. I have a pro-197 I have the system running on NFM not fm because they use narrow band. I have the attn on. I have the sound boost on. any other ideals? When tonto goes to National flight theyare nice and clear, but when they run off of Ord or Humboldt very fuzzy comms.