I have that same issue...
I have some very dirty grow lights about two blocks from me. They are
dirty as they come... Splattering across 80-20 meters. The K3 has
never been able to adequately clean up the crud from them.
In defense of the NB/NR on the K3, the signals are on the order of S7 to
S9, so my expectations may be too high for the K3. I just hope the K4
NB/NR work better in my environment.
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 12/15/21 06:36, Pete Smith N4ZR wrote:
Last weekend during the 10 meter contest I was experiencing very loud
line-noise-like interference when my antenna was pointing south. I
tried both my K3's Noise Reduction and Noise Blanker functions, and was
unable to find any setting that gave useful relief. With the noise
blanker, in particular, I noticed that when it was on, not only was the
buzz still very strong, but it seemed as if all CW signals on the band
were being hum-modulated. As soon as I turned off the noise blanker,
the CW signals cleaned up. Is there something wrong with my radio, or
an adjustment issue, or is this interference simply too strong?
Obviously, I'll be trying to track it down, but it's not there all the
time, so that could be tough.
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