[Elecraft] K3 new V3.25 NR not so good for CW week signal

[William Carver]

I've noticed in homebrew receivers as the bandwidth narrowed, shedding
noise and QRM I preferred the gain to go up, increaseing the in-passband
signal amplitude. I always attributed it to formative years with a
Heathkit Q multiplier. It may be an effect similar to AGC with
adjustable flatness (May 1996 analog circuit, in DSP of K3). I found I
preferred to have strong signals sound louder rather than perfectly
flat. Prolly a psycho-acoustic explanation (or maybe just get my head
examined?).

In firmware one could increase the audio gain by an adjustable amount as
the IF bandwidth was decreased, with an operator-settable scaling
number. Say 0 = gain independent of bandwidth, to 100 = gain multiplied
by K * (2800/DSP bandwidth). Very similar to the AGC rise scaling. That
sounds good to me.