Don't overlook the situation of a micro arc inside the transformer can.
These (in my experience) have a very strong low frequency component with
little high frequency energy. They are a bear to pin down by df'ing
alone. One important clue is that the noise is unaffected by precipitation
or wind. In my immediate area I have had issues 5 of these, including two
that were on my property. Our utility has enough confidence in me to swap
out a transformer on my say so and I want to keep it that way. I haven't
been wrong - yet.
73 Don
VE6JY
On Sun, Jan 12, 2020 at 5:53 AM <donovanf@starpower.net> wrote:
> Hi Kenny,
>
>
> RFI on 160 and not on any higher frequencies isn't a typical
> characteristic
> of power line RFI.
>
>
> I woudn't recommend giving anyone a list of a dozen poles...
>
>
> 73
> Frank
> W3LPL
>
> ----- Original Message -----
>
> From: "Kenny Silverman" <kenny.k2kw@gmail.com>
> To: jwin95@yahoo.com
> Cc: "RFI" <rfi@contesting.com>
> Sent: Sunday, January 12, 2020 4:03:01 AM
> Subject: Re: [RFI] Guidance on finding noise?
>
> The noise is mainly on 160. Slight to no noise on 80/40, and no detection
> at AM VHF.
>
> Regards , Kenny K2KW
>
> > On Jan 11, 2020, at 10:16 PM, AA5CT <jwin95@yahoo.com> wrote:
> >
> >
> > Kenny,
> >
> > Did you whip out your VHF and UHF beams with an AM rx
> > mode receiver once close to the suspect poles? That is the
> > only way, and it is a conclusive way, that I have found to ID
> > noisy power poles once the HF DF loop gets you in the
> > area of the noise source.
> >
> > de AA5CT
> >
> > .
> > .
> > On Saturday, January 11, 2020, 9:03:04 PM CST, Kenny Silverman <
> kenny.k2kw@gmail.com> wrote:
> >
> >
> > KC4D,N3AC and N3CW went hunting with a KX3 and a DX Engineering
> Amplified RX loop and again didn’t find anything conclusive. Basically they
> said the loop performed about the same as one of the AM radios we have
> that’s fairly directional.
> >
> > We’ve been looking so many times that we’re getting frustrated. There
> are a few noisy clusters, but we can’t find a specific pole or house. Nor
> can we assess if the noisy areas are actually the key offender(s)
> >
> > Do we call in the clusters we found ? Or do we really need to pinpoint
> the source(s) better before we ask for crews to come out? We’re concerned
> about crying wolf and/or giving a list of more than a dozen poles for the
> power company to look at.
> >
> > Regards , Kenny K2KW
> >
> > P.S. the only success so far is fixing my subject line typo 🤓
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