K3 NR

[Deni F5VJC]

I have never been too fond of  DSP NR in any rig  but this latest
from Elecraft really is impressive.
NR is absolutely amazing on CW and very very good on SSB.
If you have any doubts just try it.
Listen to CW in a wider bandwidth than you would normally (just to try
it), Say 1kHz,
then engage a NR setting of choice, it works!!

I listen a LOT to very weak signals and this version of NR is the best
so far.

Also just completed the latest hardware mods, so all in all very happy,
thanks guys.
--
73, Deni
F5VJC




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[Brett Howard]

Agreed setting the BW a bit wider than needed helps the filter out it
seems but even at very narrow widths it does help.  

I was just operating in CW a lil bit ago and a station ended its QSO dit
dit and then the rig went silent.  I turned up the volume a bit and man
there was nothing... Oh yea I've got NR turned on.  Click and poof oh ok
the band is back...  Then I thought hrm...  What if I tune the band in
that condition.  It almost felt as though I was simply changing
frequency with the volume set to minimum but as I tuned across stations
they just cranked up to the volume you'd expect... But the noise was
just gone.  About the only time you could hear any sort of noise at all
was if the station was close to the noise floor...

~Brett

On Wed, 2009-08-26 at 12:00 +0200, Deni wrote:

> I have never been too fond of  DSP NR in any rig  but this latest
> from Elecraft really is impressive.
> NR is absolutely amazing on CW and very very good on SSB.
> If you have any doubts just try it.
> Listen to CW in a wider bandwidth than you would normally (just to try
> it), Say 1kHz,
> then engage a NR setting of choice, it works!!
>
> I listen a LOT to very weak signals and this version of NR is the best
> so far.
>
> Also just completed the latest hardware mods, so all in all very happy,
> thanks guys.

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[Alexandr Kobranov]

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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[K2QI]

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 <[hidden email]>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
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

--
73 de James K2QI
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