[RFI] Grow Lights

[Dave Cole]

David,

I have used this technique as well, and it does work...  :)

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 3:40 PM, David Eckhardt wrote:
> I've done one growlight location, not for myself, but a friend who was
> experiencing severe RFI from somewhere in his close neighborhood.  We went
> around the neighborhood with some very intimidating-looking antennas,
> electronics, and laptops.  The interference ceased after about 30-minutes
> of 'being obvious' on the hunt for the problem location.  We suspect
> whomever was conducting the operation saw us and got scared.  It's never
> come on again, even after 5 months.  Take all the geeky equipment you can,
> even if it doesn't work anymore, lots of antennas, even a few things that
> go 'click' or squeal.
> 
> Dave - WØLEV
> 
> On Tue, Jan 7, 2020 at 11:22 PM James Jordan <k4qpl2 at gmail.com> wrote:
> 
>> Can’t offer specific help, but I would certainly be cautious about
>> knocking on doors where you suspect powerful grow lights. They just might
>> not be trying to get beautiful blossoms on their roses 😉.
>> Good luck. 73,
>> Jim K4QPL
>>
>> Sent from my iPhone
>>
>>> On Jan 7, 2020, at 1:25 PM, Karin Johnson <karinann at tampabay.rr.com>
>> 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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> 
>