[RFI] Grow Lights

[Dave Cole]

This assumes you actually see the RFI at higher frequencies...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 1/7/20 12:54 PM, Dave Cole wrote:
> Hi Karin,
> 
> Move up in frequency until you are seeing something like S-4, or S-5, 
> then try your DFing again...  Don't expect an exact match on the 
> spectrum.  Rather, look for patterns in on'/off times...  See:
> 
> https://www.nk7z.net/rfi-now/
> 
> look at the section on "S-Meter lite"...  If you are seeing the RFI come 
> on at the exact same time, and go off at the same time each day, good 
> chance it is a grow op.  After some weeks the pattern will change, then 
> start repeating again with new times.  S-Meter lite lets you save the 
> data and graph it.  Always good in the event you need to involve the 
> ARRL/FCC.  Start a log today of all activities you are taking, and 
> everyone you talk to regarding the mitigation of the RFI.
> 
> 
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist
> ARRL Asst. Director, NW Division, Technical Resources
> 
> On 1/7/20 10:25 AM, Karin Johnson wrote:
>> Hello Group:
>> I would be interested in emailing/speaking with anyone on the this list
>> directly, who has had some personal experience with Grow Light RFI.
>> Rather than take up bandwidth on this list.  I have a specific Spectrum
>> and signal grouping that could be grow lights but am unable to positively
>> nail it down to a specific home.  Rather there appears conflicting 
>> direction
>> finding bearings when I get close to the source.  I am using NationalRF
>> loops For 3 to 8 MHz. Besides that I am reluctant to go knocking on 
>> peoples
>> doors right now.  From what I have seen on the NK7Z screen shots they
>> don't exactly correlate to grow lights.  I can supply audio and spectral
>> plots to enable a discussion.  Just to close this missive, the time
>> for ON/OFF seems to correspond to a high powered grow light.
>>
>> Regards,
>> Karin Anne Johnson  K3UU
>> Palm Harbor, FL
>>
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