[RFI] 2 MW Solar Farm

[Bill Steffey NY9H]

take measurements NOW before they turn it on...      broadcast AM thru 
50 mhz....

then  duck



bill ny9h      with a mere little 10KW system  with zero noise

On 9/22/2020 10:21 AM, Jpock wrote:
> Ed,
>
> I have a  RSPduo SDRplay and Kenwood TH-D74 handheld radio setups.  
> Someone is putting in a large solar farm just north of me in Sturgis 
> Mich., about 10 miles.  It is not in service as of yet, but it will 
> soon be operational.  If you wish, I can take some measurements once 
> it is operational.
>
> Is there anything extra or special you want me to do, just let me know.
>
> Respectfully,
> Jim N9PXO
>
> ------ Original Message ------
> From: "Hare, Ed W1RFI" <w1rfi at arrl.org>
> To: "rfi at contesting.com" <rfi at contesting.com>; "Jpock" <jhpock at gmail.com>
> Sent: 9/22/2020 09:46:07
> Subject: Re: [RFI] 2 MW Solar Farm
>
>> 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 at contesting.com> on behalf of 
>> Jpock <jhpock at gmail.com>
>> Sent: Tuesday, September 22, 2020 8:48 AM
>> To:rfi at contesting.com <rfi at contesting.com>
>> Subject: [RFI] 2 MW Solar Farm
>>
>> To rfi at 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 at sdellington.us>
>> To: rfi at 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 at contesting.com
>> >>http://lists.contesting.com/mailman/listinfo/rfi
>> >
>> >
>> >-- Scott  K9MA
>> >
>> >k9ma at sdellington.us
>> >
>> >_______________________________________________
>> >RFI mailing list
>> >RFI at contesting.com
>> >http://lists.contesting.com/mailman/listinfo/rfi
>>
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