[Elecraft] K3 Noise Reduction

[David Gilbert]

Anybody know if they are less useless on the K4?

73,
Dave   AB7E


On 12/15/2021 8:05 AM, David Hachadorian wrote:
> 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.