[Elecraft] KX3 audio quirk

[Mike Lichtman]

  I am using the KX3 with the KXPA100 with the built in tuner. Earlier today when I turned on the Notch filter to kill a heterodyne, it was successful but also muted the audio a bit. When I then turned the Shift/Width control the slightest amount the audio came back to normal volume. Has anyone noticed this before? Did I miss something in the manual on it?  73 Mike KF6KXG