Thanks to AI5II's suggestions got the Tx problem fixed. Changed the Rig to KX3 and PTT to CAT. So the Signalink Tigertronics guidance was not accurate, at least for me. Also had Win4K3 running and it was using the KX3 comport. So closed that program and now the KX3 is receiving and transmitting fine on WSJT-X. 73Paulw2eck