For 12 years I've tried to get any enhancement of s/n from the K3 IF/RF
NB and NR. I haven't seen one case where there is any improvement under
contest conditions. When the s/n just starts to improve, the desired
signal is modulated and degraded by nearby signals to the point where
reception is better with NB/NR turned off. As far as I can see, both of
these features are useless on the K3 under contest conditions.
Dave Hachadorian, K6LL
Yuma, AZ
On 12/15/2021 7:36 AM, 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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