Cannot duplicate here: F/W 3.06, VFO IND no, NB operational in both rx across full range of NB parameters. 73 Pete F5VNB ON4WIX wrote: > FWIW: I just loaded F/W 2.78. NB works FB on both main and sub receivers. > Must be a firmware bug in 3.06 then... > > Anyone who can duplicate this? >