[Elecraft] K3 Cw pileup problem: effects of Noise blanker?

[ni0c]

I've been thinking about the recently reported "cw pileup" problem,
wondering why this apparently wasn't noticed before-- particularly by
the VP6DX operators.

I'm using a K3 with a single receiver, and use the three narrowest 
roofing filters, operating CW almost exclusively.  In combing through
large pileups (notably during the recent K5D operations), I've sometimes
noticed a blurring or smearing effect caused by multiple signals in a very
narrow bandwidth.  I'm not certain of this because it is such a dynamic 
intermittent problem; however it seems to be ameliorated when I turn off
the noise blanker.  (The K3 NB is so effective, compared to noise blankers 
on other receivers I've used, that I tend to have it on all the time).

My guess is that the VP6DX operators probably never needed the noise blanker in their (presumably) quiet QTH.  

It may be that the solution to this problem may be different for those using
a single receiver K3 versus the dual receiver.  It may be that the solution could be as simple as disabling the NB when switching from VFO A to VFO B.

Forgive my tardy input to this conversation; however I woke up very early this morning with these thoughts in mind.  (I wish I had some thoughts about solving the world's economic problems.) 

73,
Chuck Guenther  NI0C
K3/100 s/n 1061