The d.c. power source is connected in series with {HEAD ~ the primary winding} of the transformer between a first electrode and a second electrode of {TAIL ~ the transistor} 
The d.c . power source is connected in series with { HEAD ~ the primary winding } of the transformer between a first electrode and a second electrode of { TAIL ~ the transistor }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL