[Elecraft] K3 Noise Reduction..revisited

[James Sarte]

Regarding noise reduction and the BHI products; I've noticed that the BHI
ANEM works substantially better than the K3's NR.  For whatever reason,
whenever I switch NR on, the band noise seems to get attenuated slightly,
but then reshaped to resemble noise in a tunnel.  It's very tiring to listen
too.  

Any suggestions?

73 de James K3JPS

Trevor Smithers wrote:
> As far as I'm aware there are two companies that produce this technology
for the amateur 
> market, BHI in the UK and Michels-Engineering in Germany. The german unit
is designed 
> specifically for the extraction of the speech waveform when surrounded by
noise. BHI is similar 
> but works with cw as well.
>
> Here are a couple of links to audio samples of both units in operation
> http://www.ing-michels.de/audio_demonstrations.html
> http://www.radio.bhinstrumentation.co.uk/html/demonstration.html
>
> There is a downside to using these units in that they only work with a
mono input so you loose the 
> binaural function. To get around this I purchased two of the internal
modules (DX21) from 
> Michels-Engineering and wired them to each stereo channel. This allows
independent control of 
> the noise reduction in each ear and retains the AFX/binaural function.
>
> 73
> Trevor  G0KTN