[Elecraft] Notch Filter/DSP

[George, W5YR]

Daniel, what is the source of this noise? Could you describe its sound?
Does it accompany SSB voices only or do you also notice it on CW? Is this a
tinnitus effect - which I have as well. Do you hear it only on the speaker
or on headphones as well?

The KAF2 provides a low-pass function when turned off which might reduce
any high-frequency artifacts coming along with SSB voice. But it is
primarily aimed at enhancing CW reception.

73/72, George    
Amateur Radio W5YR -  the Yellow Rose of Texas
In the 57th year and it just keeps getting better!
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
K2 #489      Icom IC-765 #2349     Icom IC-756 PRO  #2121


Daniel wrote:
> 
> Hi to group,
> 
> I had a slight hearing problem after listening to my spkr audio from the Elecraft K2.
> 
> I got this high pitch noise on top of someone's voice on an HF Frequency.  I tried using my filters and RF gain backed down to get rid of it.  Doesn't work.
> 
> Is there a way that I can notch my audio, like the feature that other factory built radios have.
> 
> Could Elecraft design a speaker like the ClearSpeech Am-Com with a Notch button on the side to filter left and right signals to get just the voice?
> 
> Or I could just get off of my own seat and do it...
> 
> I have no intention to modify my radio unless it is an official mod/change.  But would rather have a plug-in circuit.  Does the KAF2 which I do not have, solve these problems?
> 
> Daniel
> KG4DNI