Hello Assaf, I have an S-9 carrier on 147.456 USB. On FM you don't hear anything but the carrier is still there of course. I suspect it is just one of many birdies from various pieces of electronic gear, either in your house or in your neighbour's house. Too many on 144-148 to even consider tracking down. One specific piece of gear that advertises that it has a birdie at 147.455 is a Radio Shack Pro-2053 Desktop Scanner. But it could be almost anything. ... Phil VE3HST __________________________________________________________________ Make your browsing faster, safer, and easier with the new Internet Explorer® 8. Optimized for Yahoo! Get it Now for Free! at http://downloads.yahoo.com/ca/internetexplorer/