[Elecraft] K3 AFX Feature

[Dave Yarnes]

Hi All,

As most of you probably know, the K3 incorporates a feature called "AFX", 
which is similar to stereo reception.  It is a DSP function, and I am 
finding it to be very beneficial.  You can read a brief description of it on 
P. 33 of the owner's manual.  As described, it does indeed make listening 
less fatiguing, or seemingly so.  But the real benefit I am finding is in 
readibility of many signals.  On SSB, many signals are definitely enhanced 
by using this feature.  It does seem to depend somewhat on just what kind of 
audio is being provided by the other station.  In other words, the benefit 
of AFX seems more pronounced on some signals as opposed to others.  The same 
occurs on CW.

If you don't have your K3 yet, but do happen to have a Heil headset with 
their phase switching feature, you can get some idea about what I am talking 
about.  But the K3's AFX feature is substanially more pronounced as to 
benefit.  AFX really seems to make some signals jump right up, and 
significantly more pleasant to listen to, besides making a signal more 
readable.  It seems particularly effective if you have any kind of noise 
level.

So, in case you were wondering, AFX is not just a "gee whiz" feature.  It 
truly does very good things.

Dave W7AQK