The rumor is that Entercom's WKAF 97.7 is likely to flip, probably to rhythmic oldies or Urban AC, maybe on Friday.The Twitter profiles for the new afternoon duo on WAAF, which WKAF simulcasts, only say 107.3. And now WAAF is being heard as the HD3 of WEEI FM 93.7, and the HD2 of WKAF (likely to stay there when the main signal flips).