Re: K3 NR

Posted by Paul - WW2PT on
URL: http://elecraft.85.s1.nabble.com/K3-NR-tp3515659p3518140.html

I found the NR in v3.25 to be excellent to my ears and a big improvement to previous versions, but I'm having a lot of trouble finding a NR setting with v3.27 that I'm comfortable with -- everything sounds like it's coming through a tunnel, even the x-1 settings. I generally prefer minimal DPS noise reduction for SSB and have rarely used the x-4 settings. I generally stuck to 4-1 or 4-2 in previous versions and rode the RF Gain to further reduce background noise when needed. Just can't find a happy setting with v3.27.  It might sound OK on one signal but awful on another, resulting in far more dial tweaking than I usually like to do.

RX EQ is flat as has been suggested, just doesn't help much. The tunnel effect is a bit less bothersome when using headphones, but I generally prefer using a pair of powered desktop speakers with AFX (Bin) turned on. Haven't tried NR in CW mode yet, my comments apply only to SSB.

I've reverted to 3.25 and then back to 3.27 just to make sure I'm hearing what I think I'm hearing. I think I can live with the new NR settings, but sure would like to have them *in addition to* the 3.25 filters which were damn near perfect for my ears. Maybe some additional less aggressive NR settings (5-1 through 5-4, 6-1 through 6-4, etc.) will make everyone happy?

Just more free advice... ;-)

73,
Paul WW2PT

Lyle Johnson wrote

The 3.27 NR F3-1 is *identical* to 3.25 NR F1-4.
The 3.27 NR F3-2 is *identical* to 3.25 NR F2-4.
The 3.27 NR F3-3 is *identical* to 3.25 NR F3-4.
The 3.27 NR F3-4 is *identical* to 3.25 NR F4-4.

The 3.27 NR F1- is "lighter" than the 3.25 NR.
The 3.27 NR F2- is a little lighter than the 3.25 NR.
The 3.27 NR F4- is "heavier" than the 3.25 NR.

I am an SSB op, not a CW op, and the NR now works much better for me.