[Elecraft] K3 Audio Low Pass Filter

[Mike Harris]

G'day,

| All in all I'm quite pleased with the sound difference.
|
| ~Brett

OK, that's couple of positive comments.  Is there any technical data on 
the characteristics of this filter.  For example, does it in any way 
respond to the "pink" vs. "white" noise thread of a few weeks ago.

I've become rather more interested in this since reactivating my K2 and 
running it side by side with the K3.  The K2 sounds so much nicer even in 
the presence of a received S3 buzzy background noise.  If only the K2 
power overshoot on 40M SSB didn't give my amp a hard time...

Now to put this in context, there was a huge improvement in the K2 as soon 
as I installed the analogue af CW filter years ago.  In SSB mode the 
filter just introduces a low pass filter which takes the hiss out of the 
audio and made it really smooth to listen to.

I have played with the DSP bandwidth settings and replicated the K2 af 
spectrum as displayed in Spectrogram to see if I can make them sound the 
same but they don't.

My agc and equalizer settings are nothing unusual or extreme.

Regards,

Mike VP8NO
K2 #1400
K3 #345