[Elecraft] K3 - RX audio degradation with ANF

[Bill]

You said, "They have gotten so good lately that it is barely 
preceptible, but its there, you can see it on a spectrum analyser. 
(Google Sabine Adaptive Audio to see a representative device, their 
older devices sound quite similar to what you hear in the K3 ANF; the 
newer ones are truly magical!)."

Professional musicians are the pickiest sound folks in the world. What 
the K3 does would be most unacceptable to them and I can say that, for 
sure, I have never heard similar at any professional music venue. The 
musicians would strangle the audio tech if it were so.

All professional automatic notch filtering used in the music field is 
done at the "what we call the audio level." It is their ONLY level, as 
they are not working with IFs etc. Hence, I can only assume that the 
audio level automatic notch filtering found in the K3 is not yet up to 
par. I say "yet" as that is the advantage of updates. At some point in 
the future, the ANF can be brought up to higher standards.

In the interim, there are AGC settings that can be varied - resulting in 
more acceptable listening. Specifically, using AGC SLP level at 2 makes 
a major improvement to my ears.

-- 
IN GOD I TRUST (but, NOT a single politician)