Yes, I know how to locate RFI. I have found many AC power
distribution-related issues that my local power company has fixed. With my
nearest neighbor over 1/2 mile away, I have yet to have found anything at
their residences. To the SW, where my noise comes from, the nearest
neighbor is over a mile away.
Thanks for the suggestion on listening to it in FM mode. Very interesting.
Using Spectran, 300 Hz is the first peak, with many more peaks every 60 Hz.
Sounds like I should walk the power line for anything obvious.
73,
Steve, N2IC
On Sat, Dec 23, 2023 at 7:43 PM Dave (NK7Z) <dave@nk7z.net> wrote:
> Hi Jim,
>
> See:
> https://www.nk7z.net/i-have-rfi-now-what-locating-it/
>
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
>
> On 12/23/23 11:46, Jim Brown wrote:
> > On 12/23/2023 11:34 AM, Steve London wrote:
> >> It will be on for several hours at a time, then disappear. Nothing else
> >> like it between 40 and 60 MHz. I would never have noticed it, except it
> >> sometimes parks itself on 50313, the 6 meter FT8 frequency.
> >
> > I strongly recommend NK7I's technique, using a wide waterfall from an
> > SDR over 24 hours to study the comings and goings of what are often
> > multiple sources, and identifying one or more as what you're hearing.
> > This gives clues about WHEN to DF it, and on what frequency(ies).
> >
> > Also, my applications note about using that spectrum/waterfall to
> > determine whether the source is electronically generated or arcing,
> > usually in the power distribution system.
> >
> > k9yc.com/publish.htm
> >
> > 73, Jim K9YC
> >
> > _______________________________________________
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> > RFI@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rfi
>
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