Further, {HEAD ~ a voltage} substantially equal to {TAIL ~ E} will be induced between the center tap CT and the upper end B of upper winding L2 
Further , { HEAD ~ a voltage } substantially equal to { TAIL ~ E } will be induced between the center tap CT and the upper end B of upper winding L2
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH