[Elecraft] K3 noise reduction

[GW0ETF]

I'd recommend a read of Lyle's description of NR in the FAQ and also in
'Operating Tips'. From this it's clear this sort of adaptive filtering is
going to be most effective for CW.

I've been using it with F2-3 setting and it works fine for me (on CW). On
signals other than very weak ones (which Lyle points out could be adversely
affected by NR), the audio actually appears to increase a notch if anything.
There is a small amount of distortion on the audio with the most noticeable
being a softening of the cw characters which will make copying slightly more
problematic in difficult conditions. 

Having said all that I still use filtering first and foremost before falling
back on things like NR; and to comment on the suggestion that NR should
remain on after switch off, I remember ages ago Eric or Wayne saying they
specifically designed the NR *not* to remain on as folk were contacting them
complaining their receiver had died when they switched their K3 back on and
not hearing any background hiss - the NR is that good! Anyway it's only one
button press to turn it back on...

73,  Stewart Rolfe, GW0ETF (K3/100 145)


Dave Martin-3 wrote:
> 
> I've about given up too, Windy.  The NR must be only for the CW ops.
> I'm about ready to order one of the speakers with NR and see if it's
> any better.  If it is, I might as well be using it with my Drake
> instead.  What we have now seems about as effective as the NR on the
> low end Icoms that I've had, which is minimal.  That's the only other
> NR I've used.  Are any of the other radios any better?  Maybe some
> owners of the competing brands could comment.
> 
> I think that one of the happier things about the K3 is the continuing
> hope of greater performance and features.  Nothin' like hope.  It
> keeps us going.
> 
> Dave  W5DHM
> 
> 
>>> Yes, I'd hope for further improvement of the NR on phone.  Even if
>>> it's not too effective I still nearly always have it on, but the radio
>>> powers up with it off and blasts me with the increased audio.  It
>>> seems like it would be nice if it powered up with the NR in the same
>>> state it was before.  Is this a problem for anyone else?
>>>
>>> Dave  W5DHM
> 
> 

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