[RFI] How to proceed?

[Michael Martin]

Hello Pete first I would suggest making sure that noise that you hear inside on 1.7 is active and make sure the noise on the street at 1.7 is active. If they are both active then there's a good chance they're the same source. If the noise isn't active on VHF VHF in that area that's because it's much further away if in fact it is a power line noise, powerline meaning generated on the power company equipment. A noise detectable on 160 m could be a mile or two away and very strong. However not at all detectable at VHF.
Go through your process again in attenuate your noise level until you can drive a block away from where you detected in hear no noise at all then you can go back to that spot. There's a lot of noises that sound like soarking that aren't sparking sources. at this point don't be so concerned about what it is but concentrate on where it is. if the noise is too strong to attenuate change the frequency. go up in frequency and find a null in the noise level and then continue your search. if the noise is a sparking source the sound of the noise won't change with a change of the frequency. when you change frequency to attenuated if the sound changes in the noise then it is not a sparking source.

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On Jan 26, 2020, 9:56 PM, at 9:56 PM, N4ZR <n4zr at comcast.net> wrote:
>Recently, I have experienced constant S8 line noise on 160 meters. 
>I've 
>killed the power in my house and run the radio on batteries, with no 
>change, so it's nothing inside.  When I drive down the road a couple 
>hundred yards away, which has a 3-phase powerline on one side, with my 
>car radio tuned to 1710 KHz, the noise is almost deafening, with 
>definite peaks at certain poles, as well as intermittent snapping and 
>crackling noises that really suggest something loose or broken..  
>However, today I went out with my homebrew VHF aircraft band Moxon, 
>hoping to narrow down the noise-maker(s) to particular poles, and to my
>
>surprise I could not hear anything comparable to what I heard at 1.7
>MHz.
>
>Any suggestions about how I might go about tracking down the source or 
>sources?  The local power company guy is very willing, but does not
>have 
>much training to go on.
>
>-- 
>73, Pete N4ZR
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