It figures that no sooner than I post a synopsis of my problem to the
list that the interference has changed.  It now cycles 3 seconds on and
3 seconds off, and has been doing that continuously all night.  It is a
ststic-like/white noise sound, totally wipes out most signals, but now
starts near the 40 meter band and goes through at least 30mhz.  I don't
have any AM receivers that receive above 30mhz so I have no idea how
far up in frequency the interference goes...  
  Something tells me it is not power lines but a consumer product in my
neighborhood.  Anyone dealt with this type of cycling interference?  Do
you think if I advised the power company they might come out and sweep
the neighborhood, at least to eliminate that it is not something from
the power grid?


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