[Elecraft] KX3/KXPA100 Loss of CW Sidetone

[Jim Kutsch, KY2D via Elecraft]

This is puzzling so I'm asking for help. When on the NJ CW net at the bottom
end of 80 meters (3.544 MHz), the KX3 CW sidetone works fine but when I use
the KXPA100 , the sidetone is silent. The CW is being sent as expected, just
no sidetone at all. On all other CW bands, it works as expected.

 

Has anyone else experienced this issue? Any ideas where I should look to
solve this problem? It's a bit difficult to use the paddle with only a
slight hum in the PC speakers across the room as the CW feedback. HI HI

 

73, Jim