[Elecraft] SN#1196 K3 General coverage

[Ed Gray W0SD]

After using #1037 this past week end, last night I started putting 
together #1196 which came right after I got back from TO5E and I was 
getting ready for the IARU contest so there just was no time.  The 
second one certainly is easier than the first. Things went well and I 
did add the General Coverage option.

This brings up some questions about the General Coverage option?  I 
confess to not knowing much about AM.  The latest I read is if you are 
in AM mode with a 2.8khz   5 pole filter in FL1 if I hold down the knob 
for normal I would get 2.8 khz but instead I get 6.0 khz????  I can 
expand it to 10 khz.  I am "hazy" in my thinking on the effect the 2.8 
roofing filter is having here. I can hear "no" difference to my ear 
between 6.0 and 10 khz so I assume the roofing filter is having its 
effect. However at 5.0 khz with the DSP I can definitely hear less 
fidelity and at 4.0 khz it does not sound very good. I suspect that the 
signal is strong enough so it is working beyond the width of the roofing 
filter.

In SSB the norm takes me to 2.7 khz and I can use the DSP out to 4.0 khz 
but I can hear no difference in fidelity.  It sounds the best at 2.7 khz 
and of course less fidelity as I narrow it down. This I guess is because 
I am just listening to one side of the AM signal.

Has there been some changes in the firmware that I don't see anything 
written up on.  I will have to say that on Short Wave and also AM 
broadcast it sounds very good in AM at 6.0 khz with the DSP.

Ed W0SD