Solved thanks to Ed W0YK, who told me to see if the K3's FSK pitch matched the MMTTY mark. It didn't, now it does and all works fine (3 modes). My K3 can listen so narrow compared to the TS-850... I think I'm going to love this rig when it gets hot on HF, expecially on CW. 73 de Franki ON5ZO