If any of you all have an HF mobile set up and can go to one of these farms,
please do and provide a report.
Date/Time:
Location (GPS coordinates and/or street address. Describe location if
necessary).
How far was the measurement location from any part of the solar system?
Sun conditions:
Band:
Receiver:
Antenna:
Antenna height:
Mode (AM preferred, SSB useful):
Bandwidth (6 kHz preferred, 3 kHz useful):
Preamp off, if possible:
Noise level:
Is the noise relatively constant across a large part of the band, or does it
get louder and weaker at regular intervals as the receiver is tuned.
If the receiver is an SDR, a waterfall or spectral sweep can be useful. If
possible, remport the received signal level in absolute units, ie dBm, dBuV,
uV, etc.
If anyone has a spectrum analyzer and, even better, a calibrated loop, sweeps
of each band made in RMS and quasi-peak (if available), 9 kHz bandwidth, with a
known reference level at the top of the analyzer screen, so much the better.
If you can make the same measurements on 6 meters, so much the better, because
if we have an absolute receive level, a known-gain antenna and known receiver
conditions, we can estimate whether the system exceeeds the FCC emissions
limits above 30 MHz.
If you make these reports here, I will pick up on them and see what we can
determine about the interference potential based on actual reports.
Ed Hare, W1RFI
________________________________
From: RFI <rfi-bounces+w1rfi=arrl.org@contesting.com> on behalf of Jpock
<jhpock@gmail.com>
Sent: Tuesday, September 22, 2020 8:48 AM
To: rfi@contesting.com <rfi@contesting.com>
Subject: [RFI] 2 MW Solar Farm
To rfi@contesting.com
Kim, I am in the same type of situation about Commercial Solar Farms in
LaGrange Indiana. The county commissioners passed a ordinance allowing
agricultural property to be transformed into solar farms. This type of
change can cause alot of problems for amateur radio operators.
Any type of information that can be shared will be useful! Thank-you
Scott K9MA for sharing.
Respectfully,
Jim N9PXO
------ Original Message ------
From: "K9MA" <k9ma@sdellington.us>
To: rfi@contesting.com
Sent: 9/21/2020 23:42:36
Subject: Re: [RFI] 2 MW Solar Farm
>Hopefully not as bad as the 2.3 MS Siemens wind turbines in New Zealand. ZL6QH
>had to abandon a huge antenna farm because of RFI. Their noise floor went up
>50 dB on 80, and only a few of the planned turbines were in operation. While
>not quite the same, solar and wind power systems both use high frequency
>switching converters capable of generating lots of RFI.
>
>http://www.zl6qh.com/rf-noise-measurements-quartz-hill-2009-v3.pdf
>
>73,
>Scott K9MA
>
>
>
>On 9/21/2020 11:56 AM, Kim Elmore wrote:
>>I just learned that a 2 MW solar farm is being built about 3/4 mi from my
>>QTH. I don’t know who is behind it, though I ssume it’s a utility company of
>>some sort as 2 MW sounds moderately large. Does anyone have any experience
>>with these? How much of an RFI source are they?
>>
>>Kim N5OP
>>
>>"People that make music together cannot be enemies, at least as long as the
>>music lasts." -- Paul Hindemith
>>_______________________________________________
>>RFI mailing list
>>RFI@contesting.com
>>http://lists.contesting.com/mailman/listinfo/rfi
>
>
>-- Scott K9MA
>
>k9ma@sdellington.us
>
>_______________________________________________
>RFI mailing list
>RFI@contesting.com
>http://lists.contesting.com/mailman/listinfo/rfi
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