[Elecraft] K3 NR triggering

[Don Wilhelm]

Joe and all,

As I understand the changes, in the pre-3.27 NR situation, there were 
audio peaks in the response envelope - so it worked very well (similar 
to an APF) for some who used a CW pitch near the peaks, but there were 
others who used other sidetone pitches and they were not happy with the 
CW NR at all.
The peaking in the response made SSB NR unusable for me, but now it 
enhances the signal while getting rid of the noise - Yes, I hear a bit 
of 'hollowness', but that is acceptable to me - at least I can hear and 
understand SSB signals down near the noise level.

The key to finding the right NR settings is to adjust them while 
listening to a signal - if there is no signal, any of the NR settings 
can reduce the noise, but it may not be a setting that is suitable for 
the band conditions, antenna, noise type or signal strength.  With 3.27 
on 20 meters at my location, I use F1-x through F2-4 on SSB, but the 
F3-x and F4-x give me some signal attenuation - many CW operators have 
reported that F3-x and F4-x work well for them on CW.  Experiment with 
it a bit, but do it while listening to the weakest signal that you wish 
to hear, and you should be able to find what will work best for you 
under those band and noise conditions.

73,
Don W3FPR

Joe Planisky wrote:
>> Some times you can't satisfy all the people all the time with one  
>> road.
>>     
>
> Truer words were never spoken!
>
> I'm a full time CW operator (well, 99.9% CW, 0.1% digital modes.)  I  
> played with the pre-3.25 NR quite a bit and I was never able to find a  
> setting that made a CW signal easier to copy, so I never actually used  
> it in a QSO.  Post-3.25, I find I'm now using it more often than not.  
> My preference would be for progress to continue in the 3.25/3.27  
> direction.  Of course, ideally they'll come up with a way to let each  
> operator use what works best for them.
>
> 73
> --
> Joe KB8AP
>   
>