Greetings RFI Group,
I was out with the local power company just last Sunday. They heard a
sparking source on their Radar engineers receiver so tried to pinpoint it with
the Radar engineers ultrasonic dish. This was during a moderate windy day and
the noise from the wind made the Dish unusable. They will be here again
tomorrow actually working on something else so we will see if they can use the
dish then. YMMV
Lee K7TJR OR
-----Original Message-----
From: RFI <rfi-bounces+k7tjr=msn.com@contesting.com> On Behalf Of n0tt1@juno.com
Sent: Saturday, April 17, 2021 1:37 PM
To: davearea51a@gmail.com; RFI@contesting.com
Subject: Re: [RFI] KC2IEB’s RFI Journey
> that is a good tool for coronal and arc discharges.
> Dave - W LEV
Yes, good tool, but keep in mind that it will not hear an arc on the "other
side" of a structure. It has to be line of sight from the arc to the receiver
or at least close to that.
RE the QST article ultrasonic pin-pointer...has anyone built it? If so, how
sensitive was it....could you hear a very small arc at 50ft? Was the
circuit quiet...i.e. was there
any "hiss" when it wasn't detecting any signal?
73,
Charlie, N0TT
>
> On Fri, Apr 16, 2021 at 9:31 PM Christopher Wawak <kc2ieb@wawak.org>
> wrote:
>
> > Hi all! I ended up splurging on this doohickey -
> > https://mfjenterprises.com/products/mfj-5008 . It's an ultra-sonic
> > receiver that purports "to pick up the noise generated by the corona
> discharge and
> > arcing connections". For those who may not be following my saga, I
> > determined using a portable SDR radio that the same noise that
> obliterates
> > 40m up through 10m comes strongest from one of two electric poles
> near my
> > house. No other poles exhibit the noise. Using the MFJ-5008, I
> immediately
> > heard a very strong ringing from one of the two poles, which
> doesn't show
> > up when I point it at other poles, houses, etc. There's a little
> sight hole
> > you can use to pinpoint the noise, which I did - it seems near the
> top of
> > the pole is where the sound is loudest. Very easy to use, and
> seemed to
> > work as advertised. Totally understand why this is expensive, it's
> a very
> > niche item. I'll need to find a lot of RFI to make up the price
> tag, but
> > additional evidence helps!
> >
> > I called the power company, who initially said they'd have a crew
> out in 4
> > hours. After days with no visit, and numerous calls to PSEG, they
> have no
> > information to provide. I filed a complaint with the NJ Board of
> Public
> > Utilities asking that they follow up with PSEG and compel them to
> consider
> > my complaint. If anyone has a contact with PSEG, I'd really
> appreciate a
> > connection off list.
> >
> > If folks are interested, I'll try to make a little video of using
> the
> > device. Also, if you're in the Southern NJ area and need to borrow
> it, I
> > accept beer! :)
> >
> > Thanks again for the help and moral support!
> >
> > 73 Chris KC2IEB
> >
> > On Sun, Apr 11, 2021 at 3:05 PM Christopher Wawak
> <kc2ieb@wawak.org>
> > wrote:
> >
> > > Hi All!
> > >
> > > I wanted to share where I was currently with my noise issue.
> > >
> > > Surprise surprise, I don t think it s solar panel noise!
> After doing some
> > > more direction finding, I seem to have nailed the source down to
> either
> > my
> > > electric meter, or one of two telephone poles. Initially I used
> an IC-705
> > > with the Flag antenna that was in QST recently and a DXE
> > > preamp/attenuators. Once I verified the signature of the same
> noise that
> > > I m getting in my antennas, I went back with a cheap AM
> antenna, since it
> > > was easier to record a video.
> > >
> > > I do have an RFI log I can share on request.
> > >
> > > I m curious what you all think of my radio direction finding
> based on a
> > > short video I created.
> > >
> > > https://youtu.be/v3oJLtUBrlc
> > >
> > > 73
> > > KC2IEB Chris
> > >
> > > On Sun, Mar 14, 2021 at 3:00 PM Christopher Wawak
> <chris@wawak.org>
> > wrote:
> > >
> > >> Hi RFI List,
> > >>
> > >>
> > >> I'm faced with S7-S9 noise across 40m-15m at 200khz intervals.
> I'm
> > >> looking for assistance resolving this RFI I suspect is coming
> from a
> > >> neighbor's solar installation. The owners are elderly, and I'm
> not sure
> > >> they'll understand and be able to remedy the situation. HF is
> next to
> > >> unusable.
> > >>
> > >>
> > >> Some questions:
> > >>
> > >> 0. So far, do I seem on the right path?
> > >>
> > >> 1. What tactics have worked in the past with getting owners to
> respond?
> > >>
> > >> 2. Right now I have an AH-4 with a wire antenna. If I switched
> to, say,
> > a
> > >> fan dipole or a beam antenna would i be able to reject the
> solar panel
> > >> noise? If my antenna were higher up, would that help?
> > >>
> > >> 3. Am I doomed to not have workable HF at home?
> > >>
> > >>
> > >> 73 Chris KC2IEB
> > >>
> > >>
> > >> (if the pictures are filtered, click here <
> >
>
https://docs.google.com/document/d/e/2PACX-1vSKoiPx-5huAG5M1gLmYFyMPRZ_WY
0PxxoC-CH7c-dpXMQZzHuvLzNX2AB8_nb8RIsN7Ri0rmXJp6Ju/pub
> > >
> > >> )
> > >>
> > >> RFI Location
> > >>
> > >> Appears to be coming from solar panels on a house behind my
> own, about
> > >> 275 away. I traced this with a loop antenna and a cheap AM
> radio
> > >> following to where the noise seemed loudest.
> > >>
> > >> Characteristics
> > >>
> > >> Heavy S7+ hash noise every ~200 khz, starting around 40m
> and going all
> > >> the way up through 15m.
> > >>
> > >>
> > >> Generally starts an hour or two after sunrise, and shuts down
> before
> > >> sunset.
> > >>
> > >> Noise Log
> > >>
> > >> 3/13/2021
> > >>
> > >> 4:00 PM Local - https://www.youtube.com/watch?v=QQZr1xXIf0Y
> whole house
> > >> power off test @ 3:14 in the video - no improvement
> > >>
> > >>
> > >> Gone by 7:53 PM
> > >>
> > >> 3/14/2021
> > >>
> > >> 8:38 am
> > >>
> > >> Some squiggles
> > >>
> > >> Showed up almost on the dot at 9am
> > >>
> > >> It s moving down the band some
> > >>
> > >> Most noticeable from 20m on up
> > >>
> > >> .
> > >>
> > >>
> > >>
> > >> --
> > >> -- Chris
> > >>
> > >
> > _______________________________________________
> > RFI mailing list
> > RFI@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rfi
> >
>
>
> --
> *Dave - W LEV*
> *Just Let Darwin Work*
> _______________________________________________
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>
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