[GCARC] Experience negotiating with RFI Owners

Sun Mar 14 21:05:54 EDT 2021

Indeed, I've been working the wisconsin qso party tonight, and shopping mag
loops. :)

The noise would be northwest for me - not a lot of dx that way so maybe
something like a beam makes more sense in this environment.

I've also shelved the HF antenna project I was planning to build a VHF/UHF
satellite station instead.

On Sun, Mar 14, 2021 at 9:01 PM Ken Bozarth <kwbozarth at gmail.com> wrote:

> I've been monitoring this issue. I have witnessed noisy systems and quiet
> ones. My next door neighbor just had a big system installed. I keep
> listening during the day with nothing heard. Surely they must have had
> final elect inspection and had the system connected and turned on. Maybe
> not. I will knock their door tomorrow and ask. My MIL has a neighbor with a
> big system. Sitting in the car, listening to 20m, noise was about S9. When
> I drove away, it was gone. I have driven by huge field systems and have
> heard nothing, but where are the chargers located? Magnetic loop antennas
> have very deep nulls in opposite directions. The mag loop is a compromise
> antenna, but if it lets a ham operate...If it were me, I'd simply become a
> mobile operator, maybe put an amp in the car. Operating at night may also
> be a solution for him.
>
> -----Original Message-----
> From: gcarc-bounces at mailman.qth.net [mailto:gcarc-bounces at mailman.qth.net]
> On Behalf Of CHARLES Colabrese
> Sent: Sunday, March 14, 2021 8:48 PM
> To: gcarc at mailman.qth.net
> Subject: Re: [GCARC] Experience negotiating with RFI Owners
>
> Christopher,
> I agree with Al.  There is probably very little the homeowner can do.  The
> noise is coming from the  charge controller(s).
> As for the directional antennas, a fan dipole will be pretty much an
> Omni-directional antenna.  A beam is directional, but you’ll get the
> greatest rejection from the back of the beam, so you’ll really only have
> one favored direction.
> Here’s a link that may be of help.
> http://www.arrl.org/forum/topics/view/1962
> It’s a few years old but the lady might still be with the FCC.  Having the
> name of the controller manufacturer (which you should be able to get from
> the installer) might help IF the FCC is interested in investigating the
> problem.  Contacting the manufacturer yourself might be worth a try.
> 73, Chuck, WA2TML
>
>
> Sent from My iPad
>
>
>
> ------ Original Message ------
>
> From: Al KB2AYU
> To: gcarc at mailman.qth.net
> Sent: March 14, 2021 at 8:01 PM
> Subject: Re: [GCARC] Experience negotiating with RFI Owners
>
> There are thousands of noisy solar installations out there. Even if the
> installation company wanted to help (which isn't likely) it would take lots
> of expen$ive work and even then there is no guarantee of success. The
> homeowners probably don't own the system, they are leasing it, so they
> aren't going to care. Unfortunately, I think you are on you own. I'm not
> sure if one of those noise cancelling antenna/receiver devices would work
> in this case. Al On 3/14/2021 3:03 PM, Christopher Wawak wrote: > 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 > > ) > > 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 > > . > >
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-- 
-- Chris