[Elecraft] K3 Notch causes distortion on SSB RX

[Bill W2BLC]

Hello Sam in Ole Angelo,

The distortion you are noticing is very real and has bothered me to no 
end. It is discussed on a couple of websites, that I am sure the 
"experts" will jump in and tell you all about.

I did some research on the subject and a lot of experimentation. I 
eventually found the distortion can be reduced (or enhanced if you like 
being annoyed) by changing the menu values of AGC SLP. I have mine set 
at 6 and it makes the warble of the ANF (Automatic Notch Filter) - far 
less than the 12 default setting. Some of my other menu settings (for 
the arm chair copy user) can be found at: http://www.w2blc.net/K3.htm

I am sure others can expound upon the whys and wherefores of the 
software anomaly that causes this annoyance. Suffice to say, invoking 
the ANF on my other rigs does not cause distortion on received signals.

As always, your mileage may vary.

Bill W2BLC K-Line