I can understand the buzz but I wonder how an OTH radar would use the tones. Maybe this is a new one. ... Martin VE3OAT KD7JYK wrote: > > Did you happen to get a recording? Hold on, somthing there now.... Three > tones then a buzz... Over The Horizon Radar. They usually sit on a > frequency for hours. Did you hear the three tones then a buzz? >