[Elecraft] How does K2 NB work?

[Chris Hurlbut]

Fred,
I just installed the NB in my K2/100 a week ago or so.  I live in an 
apartment and while at home I have a (very) poor antenna, but the 
powerline noise is out of control.  The NB solves it 100%.  In fact, I 
have yet to hear any distorted CW signals with it on low threshold, on 
either NB1 or NB2.  I was very impressed.  I don't really listen to SSB, 
so I can't comment on the NB quality vs signal distortion.  Why ruin a 
perfectly good radio with the SSB board?  :)

This is only on powerline noise though, of course it does nothing on 
"normal" noise.  I haven't tried it mobile yet, but I would guess it 
will do a FB job on real ignition noise.

-Chris KL9A


Fred (FL) wrote:
> Hi -
>
> Thinking of building my 2nd K2.  I wondered what
> the consensus is on HOW WELL DOES THE NB WORK? 
> in a K2?
>
> In my spring #5422 K2 - I never could see much
> improvement in "noise" elimination.  I had 
> experienced a situation where we had major
> trucks near our house (cement job) - and the
> ignition or engine electrical noise was major.
> The NB, in either setting - semmed to do nothing
> noticeable to remove this type of noise.
>
> The repetitive "popcorn" hissing noise - sort
> of regular brownian white noise one hears on
> 40 and 20 - wasn't improved on either.
>
> I even built a 2nd NB kit from Elecraft -
> that didn't improve the noise operation
> either.  The K2 itself appeared 100% in
> spec, filters all aligned with Spectrogram,
> and the rig passed every construction test
> and specification with flying colors. And
> it had 100% toroid guy toroids throughout.
>
> Maybe these are 2 cases of the type of noise
> that the NB doesn't deal with - what noise 
> does it eliminate?   I know on previous Icom
> and Kenwood rigs - NB did remove or at least
> diminish noises of these types?  Is DSP the
> better way to go?
>
> Thanks,
> Fred
> N3CSY
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft    
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>