I'm hearing the Letterman TV show here in Knoxville. I've got a GRE PSR 500 scanner with a Radioshack 36 inch mag mount antenna. The signal starts to show up on 49.65 and peaks in clarity and strength on 49.66125MHz where I can understand if perfectly with only a little bit of static. Is this an image? or does somebody have a 49MHz baby monitor in the area that's picking up the show in their house and is rebroadcasting it? I can tune this frequency in the morning and hear nothing. Oh, and the scanner seems to think the signal has a CTCSS tone of 118.8 but when I apply that tone, it mutes the audio. I have to run no tone to hear anything.