A voltage is induced in the lower end A of lower winding L1 of such transformer to produce a voltage VB substantially equal to 2E between {TAIL ~ ends A}, B of the primary of {HEAD ~ transformer T}; here, however, the voltage at end 
A voltage is induced in the lower end A of lower winding L1 of such transformer to produce a voltage VB substantially equal to 2E between { TAIL ~ ends A } , B of the primary of { HEAD ~ transformer T } ; here , however , the voltage at end
OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH