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