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[RFI] Recent 40 Meter AC noises?

To: rfi@contesting.com
Subject: [RFI] Recent 40 Meter AC noises?
From: "Paul K." <hglent@frii.com>
Date: Thu, 30 Aug 2012 12:35:23 -0400
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
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.

Paul K. WA0BAG
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