[Elecraft] KX3: Weird behavior with WSPR

[Don Wilhelm]

Ken,

I am not going to guess at exactly where your problem may be - other 
than to say it is somewhere in the audio being fed to your KX3.
You may be getting power out, but if you do not drive the audio to the 4 
bars solid with the 5th bar flickering, your power output will not be 
steady.  That is just the way it works with the KX3 power control system.

The software application can cause more or less audio output, so it may 
be that the audio level produced by WSJT-X is different than that 
produced by WSPR 2.12.

There is one thing seldom mentioned about the KX3 - if you drive the 
audio too hard (overload), it will appear as though you do not have 
sufficient audio.  Set the sliders for the soundcard output to about 
half scale, and then start with the KX3 mic gain at a low level. Then 
bring the MIC gain up until you see the proper amount of audio.

73,
Don W3FPR

On 10/18/2015 7:24 PM, Ken Alexander wrote:
> I installed WSPR version 2.12_r3617 a few days ago and it does not 
> "appear" to be transmitting.  The VOX on my KX3 activates and the TX 
> LED lights up, but no ALC bars.  Switching between the ALC meter and 
> the SWR/Power meter I can see that I'm putting out 5 watts, but 
> apparently no audio based on the lack of an indication on the ALC 
> meter.  HOWEVER, people are reporting receiving me on WSPRnet, so I'm 
> not seeing any ALC indication but I'm getting out.
>
> - The audio interface is a Creative model SB1095 external USB soundcard.
> - I'm using the latest version of WSJT-X successfully with the same 
> setup.
> - Mode:  DATA A
>