Posted by
Geoffrey Mackenzie-Kennedy on
Nov 27, 2010; 1:59pm
URL: http://elecraft.85.s1.nabble.com/K3-noise-reduction-performance-tp5779574p5779702.html
Hello James,
I use a BHI ANEM Mk II with my K2, and get similar results.
My K2 does not have the Noise Blanker installed nor the DSP, one reason
being that man-made noise at this quiet rural location was never a problem.
But, about two years ago some new neighbours arrived armed with some device
that generates RFI, which I think is something used in their kitchen, maybe
a blender - hence the purchase of the BHI which solved this noise problem
when using the K2.
The NR in my Perseus SDR performs well, but not quite as well as the BHI -
but that is an impression.
The usual disclaimers apply.
73,
Geoff
GM4ESD
On November 27, 2010, at 12:16 PM, James Sarte (K2QI) wrote:
<snip>
> Below are several links to audio recordings of a product I used to own.
> It
> is called the BHI ANEM (Mk. II). Sadly, I sold it after getting the K3. I
> should have hung on to it as it has become my benchmark for NR
> performance.
>
> These are some sample recordings of the ANEM being turned on and off.
> These
> recordings are found on W4RT's website
>
> 20 m SSB <
http://www.w4rt.com/BHI/20Mband-ssb.wav>
> 80 m SSB <
http://www.w4rt.com/BHI/80conv-ssb.wav>
> 80 m SSB <
http://www.w4rt.com/BHI/80Mconv2-ssb.wav>
>
> I've also compared the K3's NR performance to that of the Icom 756 Pro 3
> which has similar NR reduction properties - albeit not as effective - as
> the
> ANEM.
>
> Perhaps I am being subjective or overly critical, but one thing you can
> easily notice with the ANEM recordings is that speech volume doesn't get
> as
> affected as the K3s. This is really surprising to me as the NR for the
> ANEM
> is AF rather than IF like what's used in our radios. This leads me to
> believe that the ANEM's NR algorithms are more effective in reducing
> background noise while leaving speech unaffected.
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