[Elecraft] K3S, no line output on 1/8" jack

[Bob]

Hi,

I've been using my K3S for a few years now, and recently tried to record a
friends signal using the Line Out stereo 1/8" jack on the back of the rig.
However, there is no line level audio output on that jack.  Like many, I
use the USB interface for audio in/out when working digital modes, and
wonder if there is some conflict between USB audio and being able to get
Line Out audio on that back panel jack.

Any thoughts?

73, Bob, WB4SON