[Elecraft] KX3 - ATU Problem

[Jim Campbell]

By paying careful attention to the manuals I have been able to level all 
my problems save one. With my non-resonant antenna attached, if I press 
the ATU TUNE pushbutton I get ERR TXO in the VFO B window and d=000 in 
the VFO A window. If I press the XMIT button the TX indicator comes on 
but there is no indication that anything else happens. If I press the 
TUNE button (long press of the XMIT button) I get an SWR indication of 
4.8-1, 4.0 W and the TX indicator comes on. The ATU MD is AUTO. If while 
in ATU MD I use the VFO A dial to go up into the L settings I can hear a 
relay click. That's the only time I can hear the relay click.

The Users Manual says that an ERR TXO means that there is a problem with 
the opposite sideband null and that this should be set at the factory. 
Any suggestions?

Thanks and 73,

Jim - W4BQP