[Elecraft] KX3 + PX3 + KXPA100 audio leakage

[eric norris]

I've started running this setup on FT8.  For some reason, I can hear the grinding FT8 sound on TX.  MON is set to 0, AF 54, MIC 60--these produce the right levels of Tx and Rx audio with the soundcard levels set mid-range.  DATA mode.  I think the sound is coming from the KX3.  Any ideas how I can make it silent?
Thanks and 73
Eric WD6DBM

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