Ed,
Perhaps you are driving the audio of the KX3 too hard. The KX3 has an
"quirk" that it uses for protection from too much audio by reducing the
input signal drastically.
Try reducing the soundcard 'speaker' slider and the 'power' slider in
WSJT-X to see if the audio input level to the KX3 is too great.
If that is the problem, then an attenuator - 10k in series with 1k
between the audio line and shield - in the line should help.
Remember that the MIC input of the KX3 is microphone level, and you are
likely driving it with 'speaker' level from the soundcard. Microphone
level is in the range of 200 to 600 millivolts while the speaker output
from the soundcard is in the range of 1 to 3 volts - BIG difference.
73,
Don W3FPR
On 10/23/2017 10:30 AM, Ed G wrote:
Hello,
I have my FT8 software set up, and am using an external E-MU 0202
soundcard. On the KX3, I am using DATA A, with soundcard output going to the
KX3 mic input. I have made a couple FT8 contacts. But the ALC setting
remains puzzling to me. I have read Don Wilhelm's setup notes for the
digital modes, but what I am seeing does not agree with the notes. I am
unable to see any ALC bars. I set power on zero, and essentially set the
audio input to what sounds good (MIC Gain midscale), then up the power to 10
watts.
If I try to change to the USB mode, the FT8 software switches the KX3
back to DATA when I click the FT8 Tune button. That may be fine, but no
matter what I do or how I set the audio input, I don't ever see any bars on
the ALC meter.
Must be something simple I am overlooking?
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