OK, here is another testament to the NB in the K3.
I have been plagued by an intermittent local noise source on 2m which
is so strong that it renders contacts 15 miles away nearly impossible
to copy (on SSB). I made a digital copy of the audio and sent it to
a receiver engineer in Sweden (who created Linrad) for analysis. He
told me that it looks like a raw electrical arc and his sw FFT NB was
unable to counter the noise.
I am running a NB digital mode (MAP65) on 2m-eme and its NB did lower
the noise amplitude but with no appreciable improvement in SNR so
only super-strong signals are decoded.
page two:
Having nothing to lose, I decide to try the NB in the K3. I played
with the setting and finally with it set to IF-MED-7 I achieved a
reduction of about 4 s-units (>20 dB) in the noise level resulting in
recovering about 70% of my normal eme sensitivity. I am impressed!
73, Ed - KL7UW
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