[Elecraft] K3 Noise Reduction

[David Hachadorian]

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.
>