Picked this up on PHL approach last night. The aircraft here, Ameristar500, takes off and is asked to turn transpoder on. Transponder appears to not work, at NY center wont take the hand off. They eventually got it figured out, but it was interesting to listen to. Sound clip is edited down from a 30 minute time frame. You only hear the aircraft a couple of times. the rest the conversation was coming over 1 sided.