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