[Elecraft] K3 DSP processor speed

[Edward R Cole]

Topic has digressed to NR:

Simple question.  Is all this feedback on how good or how bad NR 
works about reception of CW (or does it apply to SSB?).  Only time I 
really need NR is when local noise overwhelms normally strong SSB 
(e.g. signal is running S8-S9 and noise rises up to S8-S9.  I find NR 
will lower the s-meter to about S6-S7 under those conditions but the 
audio is distorted by NR such that intelligibility is lowered - ergo 
no help to copy the signal.  I've tried several NR settings with some 
being better but none helping me understand speech better than 
running without NR.  Often NB works better than NR, but NB also tends 
to distort audio.

Using NR with normal noise conditions it is never helpful for 
improving intelligibility (for me).  I will admit that I have extreme 
hearing issues that make ordinary speech a challenge.  So any 
processing that imparts distortion reduces my ability to understand speech.

It seems to me that NR appears to experience IMD with the noise frequencies.

To be fair I have not had success using NR with other brand radios, 
either.  The only NR that works for me is in my expensive Bose 
airline headset.  That is working on different nature of noise (probably).

To be fair I represent 0.2% of the population that NR probably is 
ineffective.  I have it selectable in my hearing aids and often find 
it is not helpful, either; rejects noise from behind me but clarity 
of sound is impacted.  In a crowded room full of babble of the 
multitude, I select the TV/music mode which provides wide-frequency 
response and I turn vol up to max. <helps a little>

73, Ed - KL7UW
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