I've got some strange new QRM on the HF bands. It is quite
strong on 40meters, but it's also audible on other bands as
well. It is coming in from the street powerlines I believe,
as it is extremely strong right at the house mains power usage
meter. The noise is still fully present on a portable radio
when the house main breaker is thrown, so I'm pretty sure it's
not in my home. The interference is very loud, and seems to
be present 24/7. It does seem to move around a bit, favoring
the 40 meter RTTY frequencies (7.070-7.100)
Any help identifying it would be greatly appreciated.
A recording is available at the following URL:
http://www.k4ro.net/k4ro/audio/K4RO_40m_QRN.mp3
Thanks for any advice.
-Kirk K4RO
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