[Elecraft] K3 noise reduction revisited

[K2QI]

Nevermind; found the AFX button and was able to turn it off completely.
Unfortunately, still no major improvement in the NR performance.

James K2QI

On Sun, Jul 12, 2009 at 4:53 PM, K2QI <k2qi.nyc at gmail.com> wrote:

> Rick,
>
> I'm assuming that the 'BIN' setting is what turns the AFX off?  I've tried
> the AFX settings with delay going from 1-5 plus BIN, and there isn't too
> much of a noticeable difference.  The DSP still works poorly.  It probaly
> wouldn't be so bad if the DSP didn't attenuate the signal as much as it does
> also.
>
> I regret selling my BHI ANEM module now; I could have used it line with my
> headphones.
>
> James K2QI
>
>   On Sun, Jul 12, 2009 at 3:40 PM, Rick Braun <rhbraun at msn.com> wrote:
>
>>  I posted this once before, but not a single response, so here goes
>> again.  I found that the F1-1 NR works OK if the AFX is turned off.  My
>> sense is that AFX plus NR is too much processing.  Try the NR without the
>> fake stereo, it seems more effective to me.
>>
>> Rick Braun
>> KE7VXP
>> K3 # 2869
>>
>>  ----- Original Message -----
>> *From:* James Sarte <k3jps.nyc at gmail.com>
>> *To:* elecraft at mailman.qth.net
>>   *Sent:* Saturday, July 11, 2009 9:06 PM
>> *Subject:* [Elecraft] K3 noise reduction revisited
>>
>> Has there been any progress on improving the NR algorithm used in the K3?
>> As it is, it's only helpful perhaps 2% of the time on SSB with the
>> remaining
>> 98% of it remaining off.  I've tried adjusting AGC settings, plus fiddling
>> with the DSP settings and can never seem to find a happy medium.
>>
>>
>>
>> Adjusting the receive EQ also has a major impact on the NR's audio
>> quality.
>> Sometimes I like to boost the midrange and treble areas on receive EQ as
>> it
>> helps with speech, but with any of the parameters set to a +1 or higher,
>> the
>> resulting audio out with NR on is terrible.  It sounds almost as if I'm
>> listening to the audio through a long drain pipe.
>>
>>
>>
>> Finally, turning on the NR generally tends to attenuate the signal rather
>> than filter it; a very annoying behavior if you ask me.  This has become
>> painfully obvious during this weekend's IARU contest.
>>
>>
>>
>> Truth be told, the best DSP application I've used and heard so far has
>> come
>> from BHI with their ANEM modules.  There are only a few settings to
>> adjust,
>> but it's very effective in isolating human speech patterns from background
>> noise.  It runs rings around the K3 when it comes to SSB noise reduction.
>> I'm hoping that sooner (rather than later), Elecraft can come up with a
>> firmware fix for the NR.
>>
>>
>>
>> 73 de James K2QI
>>
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>