[Elecraft] K3 Noise Reduction question

[ab2tc]

Hi,

Have you tried the NB (*not* NR)? I find it very effective against power
line noise. I use the setting t2-6, IF off. For a long time I was using a
combination of DSP and IF setting, but found that the IF contribution was
little or non-existing, so I switched to DSP NB only.

AB2TC - Knut


k6dgw 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
> 
> <snip>
> 


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