[Elecraft] Re: K3 Audio

[Joe Subich, W4TV]

> There is still a bit of a problem on receive audio.  This has 
> been there for some time and exists in the form of harmonics. 
>  The 3rd harmonic is quite easy to see and repeatable.  I 
> used HRD to show this on the waterfall after a conversation 
> with a friend. You can clearly see the harmonic at..

You are overdriving your sound card or the line out transformer 
in the K3.  

I have measured the third harmonic using an audio spectrum analyzer
at both the line out and headphone jacks of my K3.  Until the level 
becomes excessive (> .7V RMS on the Line Out) the third harmonic is 
more than 50 dB down (Line Out) and more than 70 dB down (headphones).  

73, 

   ... Joe, W4TV