[Elecraft] K3 NR and RX EQ

[James Sarte]

Hello Lexa,

Seems like a legitimate question.  Prior to 3.25, NR settings and its
ability to reduce noise were greatly affected by EQ settings. For example,
boosting midrange frequencies to enhance voice audio caused the NR algorithm
to produce very hollow sounding voices; as if listening to someone yell
through a long drain pipe.  It could also cause clipping or distortion if EQ
settings were "over-boosted" in certain ranges.  Also, it wasn't just the EQ
that affected NR quality, but also the AGC settings.

I haven't had much time to play with 3.27 (just installed last night), but
so far, all of my testing has been done with AGC being left at one setting,
and EQ flat.  This way, I can determine how effective the noise reduction
really is with the same set of operating variables.  It's sort of a moot
point now that I think about it, to ask how people feel the NR has improved
or degraded if everyone has different EQ and AGC settings; it will be
difficult or impossible to get a consistent answer throughout the test
group.

73 de James K2QI

On Wed, Aug 26, 2009 at 9:26 AM, Alexandr Kobranov <kobranov at amoscz.cz>wrote:

> Can everybody reporting about NR excellent/non-excellent functionality
> add some info about his/her RX EQ settings and BW used? I suppose
> there are big confusions in reports based on different settings.
> Maybe - later, later, not now :-) - can be some RX EQ forced in NR
> mode to avoid problems etc...
> The same with NR setting per-mode etc.
> But for now, please let us know your RX EQ settings and BW used while
> reporting NR experience.
>
> Or am I wrong with such request?
>
> 73!
> Lexa, ok1dst
> K3/10 #727
>
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-- 
73 de James K2QI