The past few weeks, not only me, but several folks I talk to around
7.260 in the mornings have complained about a "AC hum." I have watched
this hum on the panadapter. It appears to be spread evenly across the
band, no peaks or dips. On the panadapter the spikes appear at about
120Hz interval, about 3 to 6 dB above the noise. I have rotated the
beam and found the peak level to be approximately 135 degrees. It has
been confirmed by a station in western Missouri, central Indiana
and Annapolis Maryland. This noise has been present nearly every
morning for the past 2 weeks, but I did not hear or see it today.
When this is on it does not sweep or pulse. It is just simply present.
I believe due to the wide spread reception of the exact same noise by
stations in vastly different areas the possibility of something locally
to any of us is highly remote.
So the curiosity is up. What do you folks think we are hearing, and are
any of you hear other reports about it.
Paul K. WA0BAG
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