I feel a bit silly asking this, but I see a lot of postings labeled with such frequencies as 13475.7, 12090.3, 6950.1 etc. What I wanted to know is how do you get such an accurate frequency when the transmission is likely perfectly modulated at a flat frequency such as 14.200? I'm not saying people are proposing it has a guess. I just wonder what factors hone in on dead center when everyone has a different ear for sounds. For instance when im on HF transmitting and receiving I just leave the dial set to where the persons voice is clear and I feel like im likely on frequency as well.