[RFI] Humming "Telephone" Poles

[Mike W2LO]

  Thank you for the responses. No, I've noticed this loud humming on days 
with absolutely no wind. If you were to hear it, it sounds just like a 
transformer hum, electricomagnetic in nature as we've all heard from a 
transformer. The only other thing to mention is that the intensity varies 
cyclically over a period of two seconds or so.  You can hear it from forty 
or so feet away.
  I've really examined these poles looking for something next to the wires 
but I can't find anything. I could see if there were a transformer there but 
there's nothing, just the single wire held up by two insulators.

                                               Mike  W2LO

>
>    There are two ordinary wooden "telephone" poles in my neighborhood
>carrying just H/V and telephone lines-no transformers, etc.-just the wires
>supported by two insulators. Occasionally when I pass them while walking,
>there is a fairly loud hum coming from them. Touching the pole you can feel
>this loud hum. Oddly these two noisy poles are separated by a non-humming
>pole, that is, there is a humming pole, 150 feet or so later there is a
>quiet pole and 150 feet later a noisy pole.
>    These poles sometimes hum and sometimes not. I don't detect any RFI 
>from
>them but is this indicative of trouble in the making? I walk extensively
>through the neighborhood but haven't detected any other noisy pole besides
>these two.
>
>                                                            Mike  W2LO
>
>
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