[Elecraft] K3 NR

[N2TK]

Typo. Tnx Don for picking that up. Yes, I mean NR. I like the way the NB
works. 

I do see a reduction in audio when turning on the NR with SSB. As an
example, I usually have the AF control around 9-9:30 position using an
external speaker or my Heil headphones. When I turn on the NR I have to use
around 10:30-11:00 position for the same audio. This is using F1-1. As I
increase (Fx-y) X from one to 4 the audio level reduces. As I increase Y
from one to 4 the audio level also decreases. So if I go to F4-4 I have to
crank the AF control fully CW and I still am not at the audio level I was
with the NR OFF and the AF control at 9:30.  Also I can definitely pull out
weak SSB signals better with the NR OFF. Right now the noise level is low,
so not sure what impact that is having.
With CW I do not need to change the AF level. I do like the way the NR works
on CW.
Typically I have the RF gain control fully CW or close to this position.
When running I don't want to be fiddling with knobs or get my ears blown
off.
Both $1435 and #311 behave the same.

I still like the Icom 756Pro III's NR better. I find I can leave the NR ON
at a low level to just take the background noise away without causing issues
or artifacts with received signals. 

Because  of the  varying comments on how the latest NR is behaving I am
wondering if there are any other parameters, especially with the AGC that
would account for these wide variations?

Work in progress.

73,
N2TK, Tony


-----Original Message-----
From: Don Wilhelm [mailto:w3fpr at embarqmail.com] 
Sent: Friday, August 28, 2009 7:48 PM
To: N2TK
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 NR

Tony,

Did you mean "NR" when you stated "NB"?  I find no audio reduction when 
turning on the NB unless I have the IF NB cranked up to maximum.

I first thought the new NR was reducing the audio, but I found it was 
not so when one is tuned to a signal. The noise reduction is so 
effective that in my case it almost behaves like a squelch because there 
is not band noise at all (my noise level is not usually very high 
anyway) - so there is a natural tendency to turn up the audio gain 
because there is no noise to hear - but when a signal is present, the 
audio is then LOUD.
As I have stated in prior posts, I *do* find a bit of AF reduction on 
SSB if I have the NR set to F3-x or F4-x, but I find NR on SSB quite 
effective at the F1-x or F2-x settings.

73,
Don W3FPR

N2TK wrote:
> Also it would be nice if the audio didn't reduce in volume when turning on
> the NB.
>  
>
>   
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