Well, 990 AM Philly needs to get a bigger wattage. They seemed to have improved their engineering and/or equipment in the past year -- the signal would go to almost zero in spurts and then come back, but this year I haven't seen that. I can pick up 1210 AM philly from almost Fort Lee NJ to near on Harrisburg PA, and south to Hagerstown MD, and east to AC. 990 seems to have at most half that spread.
Recently -- and happily -- I managed to pick up 770 AM NYC at Levin time just east of Harrisburg.