A second secondary winding of the transformer is connected between the other end of the first secondary winding of the transformer and the junction of the d.c. power source and {HEAD ~ the primary winding} of {TAIL ~ the transformer} 
A second secondary winding of the transformer is connected between the other end of the first secondary winding of the transformer and the junction of the d.c . power source and { HEAD ~ the primary winding } of { TAIL ~ the transformer }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL