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