At 4/28/2010 15:19, you wrote: >Can anybody identify the signal in the attached file? It appears on 158.275 >+/- 5 KHz or so. I set my receiver to AM mode for this recording. It does >appear in FM and NFM, but not as clearly. Note that the PRF is not fixed... >it does vary over time. It is audible over a fairly large (10 - 12 miles >that I've checked so far) area.
No idea what it is, but listen closely around the 9-10 second mark. Almost sounds like a faint noisy echo, or perhaps a distant responding station, which would be a form of ALE. Bob NO6B
