[RFI] Peculiar Noise

[Dave (NK7Z)]

Hi Jim,

See:
https://www.nk7z.net/i-have-rfi-now-what-locating-it/

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

On 12/23/23 11:46, Jim Brown wrote:
> On 12/23/2023 11:34 AM, Steve London wrote:
>> It will be on for several hours at a time, then disappear. Nothing else
>> like it between 40 and 60 MHz. I would never have noticed it, except it
>> sometimes parks itself on 50313, the 6 meter FT8 frequency.
> 
> I strongly recommend NK7I's technique, using a wide waterfall from an 
> SDR over 24 hours to study the comings and goings of what are often 
> multiple sources, and identifying one or more as what you're hearing. 
> This gives clues about WHEN to DF it, and on what frequency(ies).
> 
> Also, my applications note about using that spectrum/waterfall to 
> determine whether the source is electronically generated or arcing, 
> usually in the power distribution system.
> 
> k9yc.com/publish.htm
> 
> 73, Jim K9YC
> 
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