[Elecraft] K3 Noise Reduction question

[Fred Jensen]

On 4/27/2012 2:32 PM, ab2tc wrote:
> 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.

Yeppers, my K3 is S/N 642 [it tells me every time I power up just in 
case I forget :-)] and I have used NB consistently on both CW and SSB. 
IF NB often drops the level 2 S-Units or sometimes 3.  Both IF and DSP 
seem to be quite sensitive to the character of the noise, I run the DSP 
between T1-5 and T2-3 usually, IF is usually on NAR 3 or 4.

On CW, I've never found much benefit from NR, regardless of the 
"aggression setting," which I've always attributed to a 150-250 Hz BW. 
When running in a contest, I'll usually run the BW at 450-500 so I can 
spot off-freq callers and the NR seems to have slightly more effect at 
the wider BW.  Since I got the P3 however, I can *see* the off-freq 
callers however and just go to them with RIT.

I don't think I've ever really tried NR on SSB until this week, when I 
noticed the reverb effect.  NB is equally effective on SSB as on CW, the 
setting is usually a bit different though at the wider BW.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2012 Cal QSO Party 6-7 Oct 2012
- www.cqp.org