[Elecraft] K3 Auto Notch distortion

[Bill Clarke]

It is more than barely noticeable or you would not have mentioned it!  I 
too have noticed it and it really bugs me - very unlike the fine 
auto-notch filters found on the Kenwood, Icom, and Yaesu rigs. The nay 
sayers in this group will quickly tell you they don't hear it or give 
excuses for its existence. Don't buy into it - the distortion does exist 
and it is very annoying. To me, there is no excuse for the notch filter 
distortion to exist on the expensive K3 - when it does not exist on 
$1000 rigs.

As a work around, I have found the following settings go a long way to 
eliminate the distortion. Be advised - these settings are for armchair 
copy on 75, 40, and 160 meters. I don't know if they would do well for 
contesting or DXing - of which I do neither.

**K3 settings (Config Menu):
     AGC DLY - NORM
     AGC HLD - 0
     AGC PLS - NORM
     AGC SLP - 4
     AGC THR - 12
     AGC F -       120
     AGC S -       20
     Shift -          1.4
     Width -        2.7
     RF Gain -    90
     ATT -           ON
     RX EQ         1         -2
                          2        0
                          3        +9
                          4        +12
                          5        +11
                          6        +14
                          7        -16
                          8        -16

Be sure to read the "Noisy K3" section on http://www.w3fpr.com/ - 
excellent information!

The disclaimer:  Your mileage for the above settings may vary - 
depending upon speaker selection, personal preferences, and your hearing 
acuity.

Note:  I made all of my settings by hand, using the K3 menus. I did NOT 
use K3 EZ as that program will sometimes upset the AGC settings.


**