Probably old information, but Fair-Rite has this 2016 QST article linked on
their site:
https://www.fair-rite.com/wpapers_anotes/can-home-solar-power-and-ham-radio-exist/
<https://www.fair-rite.com/wpapers_anotes/can-home-solar-power-and-ham-radio-exist/>
Ken
________________
Ken Wyatt
wyattphoto@mac.com
> On May 25, 2021, at 10:00 AM, rfi-request@contesting.com wrote:
>
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> Today's Topics:
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> 1. Re: SOLAR INSTALLATION PROS/CONS (Gary Johnson)
> 2. Re: Crepe Myrtle growing into power pole RFI Why? (Charles Plunk)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 25 May 2021 07:47:50 -0700
> From: Gary Johnson <gwj@wb9jps.com>
> To: rfi@contesting.com, rtdevine@comcast.net
> Subject: Re: [RFI] SOLAR INSTALLATION PROS/CONS
> Message-ID: <B0F95A44-0F03-4FE7-BA29-4100AED68B1E@wb9jps.com>
> Content-Type: text/plain; charset=utf-8
>
> Search for solaredge in our archives at
> http://lists.contesting.com/mailman/listinfo/rfi
> <http://lists.contesting.com/mailman/listinfo/rfi> and you will find hundreds
> of posts. The company was also the subject of a QST article by KQ6RS. In a
> word, SolarEdge is notorious for RFI problems due to their microinverters.
> The system installed next door is one of the reasons I no longer have a home
> station, if that tells you anything. But if the installer can supply Enphase,
> then you have a chance. If I had a choice, I?d go with a single, central
> inverter.
>
> -Gary NA6O
>
>>
>> I have talked with the company (Sun Run Installation). He is going to check
>> Solar Edge micro inverters to see if problems. I believe they use Solar
>> Edge but they have and can put Enphase micro inverters instead at a slightly
>> higher cost.
>>
>> Thoughts???
>>
>> Robert T. Devine, KC6AWX
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Tue, 25 May 2021 10:13:11 -0500
> From: Charles Plunk <af4o@twc.com>
> To: Rfi List <rfi@contesting.com>
> Subject: Re: [RFI] Crepe Myrtle growing into power pole RFI Why?
> Message-ID: <27feefd3-3cab-28a8-d592-eefcdfeba6ff@twc.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> All I know is the crepe myrtle had overtaken the ~ lower 20' of the
> pole. Some branches >1" in diameter had grown around the pole, the
> branches flattening out as they touched the pole. Only thing at that
> height it could be touching was the stapled ground as it was shy of the
> CATV/Phone level. I never saw it touching the ground though as the
> foliage was too thick.
>
> ID'ed as 120hz, direction with 6m/2m beams, triangulated with 2m
> portable, heard it with ultrasonic on a completely wind free night
> matching noise pattern pointing at the crepe myrtle (~10' height), heard
> nothing top half of the pole, noise was heard on one side of the pole.
> Was getting s9+10db noise on 80m and all through the HF bands up through
> 2m. But doublet end was within ~20' of the pole. Crepe myrtle cut away
> from the pole and the noise is completely gone. In fact some
> intermittent I had been hearing in that direction is gone.
>
> Pole is minimal hardware with 3x 7.2kv phase lines going across the top
> and a street light. About 10-15 years ago they completely rebuilt the
> pole with new power hardware, due to my complaints, and it has been
> noise free since until a few days ago.
>
> In fairness though, the noise was active for about 2 days solid but with
> varying pattern before I tracked and has been gone now for about 1 day
> so maybe not enough time to fully evaluate as a success. The
> wind/weather has been very calm throughout this period. If it comes back
> will report it here.
>
> Years ago I had 2 similar issues here but with vines. One on the 3
> phase, one on single phase. In each case they were removed and the noise
> gone. Foliage here in the south is very moist and aggressive especially
> this time of the year.
>
>
>>
>> As for the crepe myrtle, you can eliminate that as a cause of your RFI
>> even if it were touching the primary. You'll get ultrasound and
>> audible noise but you will not get rf. Contrary to what many people
>> say about finding their sources as trees touching the line, I have
>> never had a tree arching to the wire creating RF noise. If the crepe
>> myrtle gets within a couple of feet of the primary turn it into your
>> utility and they'll take care of it.
>>
>>
>>
>
>
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>
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> ------------------------------
>
> End of RFI Digest, Vol 220, Issue 26
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