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