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
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