That's interesting. When I am downtown I don't get interference on 450 to 460. I've been at New Jersey and Michigan, North and New Jersey, Washington and Illinois, Circle Centre....... Nope, only an occasional bit of interference on some frequencies but not on the entire band of 450 - 460... or 432 - 512.It depends on your location. If you are downtown in the RF zone you will get this on ALL freqs. When you get north of downtown on I-65 from the downtown area your interference will not be there.