[RFI] Line noise vs Frequency

[Pete Smith N4ZR]

A (probably) dumb question:  I have a severe line noise to my west.  For 
some reason it is manageable on 20, much worse on 15 and crippling on 
10.  These subjective descriptions are confirmed on my S-meter. Why 
would this be happening, and does it offer any helpful clues to finding 
the source?

-- 
73, Pete N4ZR
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