Topband: 160M_AC_BUZZ

[george]

I have noticed an alarming raspy noise on the lower portion of the 160 band 
especially in the AM mode of receive. Above 1.9MHZ it is tolerable but in my 
favorite portion of the band 1.8 to 1.85 CW it runs a S9. I can hear the 
buzzing all the way down to the AM broadcast band. I can use the blanker to 
remove it but strong near-by signals overload the blanker.
I got up at 1AM last night and it was not there??? This morning,  back 
again.
I also ran my rig on a 12V battery and shut down the AC to my  whole house 
with no help.
I ran the streets with my mobile rig on 121.0MHZ AM receive and  found one 
pole was emitting the buzzing sound but not loud as I  would expect. I 
suspect since it is only during the day that it is  load related and maybe a
loose connection to the HV line to the  pole pig and not a arcing insulator.
Any ideas before the 160 DX season begins on how to find the culprit?
By the way, I called the local Electric Company and put in a complaint.
Any suggestions for finding the problem?
I hope I can get this fixed before the 160 DX season!
George W2YJ


George W2YJ