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