[Elecraft] K3 filter ringing at 50Hz

[Dave G4AON]

I'm running a pre-release beta (f/w ver 3.41). Hardware is an 8 pole 250
Hz filter and no NR. I am using a centre frequency/pitch of 700 Hz. On
80m this evening (8pm local) there is little difference between 50 Hz
and wider settings of the DSP bandwidth on both weak and strong signals,
the band is fairly quiet. I don't often go that narrow as few can net
within 300 Hz let alone 50 Hz, so have little experience of using that
bandwidth, but it sounds fine here on my K3. NR has little effect on CW
at very narrow bandwidths like 50 Hz, however it doesn't make the signal
ring at any level of NR setting.

73 Dave, G4AON
K3/100 #80
==============

I was wondering if anybody else has noticed this or is it just me. With
3.30
firmware I am noticing some ringing on CW with the DSP bandwidth at
50Hz. It
clears up at 100Hz. I don't remember hearing this with earlier firmware. I
haven't tried reloading older firmware.
<SNIP>
Mike K2MK