Hi, Should be something stupid - worked FB yesterday, no changes since then. Works FB from A and from B, nothing happens when split is activated. All bands. Only thing different from yeste4rday -started on new band RTTY (12m - no QSO with K3 there before) - had to change to FSK-D. Firmware - latest. GL Arunas/ LY2ij / K3 s/n 5oo