Posted by
Jim Brown-10 on
Feb 24, 2020; 6:39pm
URL: http://elecraft.85.s1.nabble.com/kx3-wsjtx-multiple-notches-tp7658581p7658583.html
On 2/24/2020 10:27 AM, Tox wrote:
> There are times though when one of a couple adjacent stations a mile
> or two from me either swing their beam over my dipole, or crank the
> knob, and desense my kx3 pretty solidly.
I've got big antennas and am surrounded by big signals when I work FT8,
but I get by just fine. Those strong signals are causing AGC in the rig
to reduce RF gain. What we need to do is drive the computer audio system
harder from the radio so that weaker signals are still within range of
the A/D converter in the computer's sound card. The fundamental settings:
1) Full RX bandwidth, let WSJT-X separate the signsls
2) Reduce RF gain (or use ATTEN) to prevent overload
3) Set audio level feeding the computer so that, when those strong
signals are present, the green bar on the left reads about 75-80 dB but
doesn't turn red (which indicates digital clip).
Yes, I know that #3 is not what the instructions say. But I have a LOT
of weak signal QSOs on 160M and 6M because set up that way.
73, Jim K9YC
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