Correspondingly, each time transistor Q2 is driven from a non conducting condition to a conducting condition in response to the positive going pulses applied by the controller 14 via line 13, current flows from the voltage source Vs through {TAIL ~ the upper winding L2} of {HEAD ~ the primary} of transformer T through transistor Q2 to ground 
Correspondingly , each time transistor Q2 is driven from a non conducting condition to a conducting condition in response to the positive going pulses applied by the controller 14 via line 13 , current flows from the voltage source Vs through { TAIL ~ the upper winding L2 } of { HEAD ~ the primary } of transformer T through transistor Q2 to ground
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