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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