[Elecraft] K3 Noise Reduction question

[Robert G. Strickland]

I also note the "hollow" sound to SSB when using the K3 NR. If I use it 
at all, it's at the lowest setting, 1-1. I had the same listening 
experience with the K2 DSP NR unit. It worked well on CW - sometimes 
miraculous - but for my ears, useless on SSB. The K3 NB works on all 
modes, every time. I haven't tried the higher K3 NR setting for SSB, 
being primarily a CW op. Also, my hearing is poor. Hearing aids all the 
time except when under the head phones and operating CW.
...robert


On 4/27/2012 20:58, Fred Jensen wrote:
> I operate mainly CW and while the NB is very effective for me on CW,
> I've never seen much advantage to the NR at narrow CW bandwidths.  I had
> occasion to be on SSB this week attempting to work several SOTA summit
> activations, and tried the NR.  At the wider SSB BW, it made a great
> difference.
>
> With NR however, even at F1-1 [which I think means least aggressive],
> while the nasty line noise really fell, the SSB signal acquired a
> profound echo which made it very hard to understand.  I'm running FW4.39
> and whatever DSP came with it.  Is this reverberation [it's more like
> that than a distinct echo, like talking through a long pipe] normal?
> The further "up" the NR scale I went, the more pronounced it got, and
> beyond F1-4, the signal was indecipherable.
>
> Full Disclosure:  My hearing sucks and has since one night in 1965 on
> the other side of the planet, so me telling you what something sounds
> like can be somewhat of a joke.  I can't use my hearing aids under my
> headphones, so I run the AF gain high ["afterburner roar" or close], but
> the reverb effect definitely is controlled by the NR.
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2012 Cal QSO Party 6-7 Oct 2012
> - www.cqp.org
>
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-- 
Robert G. Strickland, PhD, ABPH - KE2WY
rcrgs at verizon.net
Syracuse, New York, USA