When the field effect transistor T becomes conductive again, {HEAD ~ the first capacitor C1} is effectively in {TAIL ~ parallel} with the series circuit of the second diode D2 and the first coil L1 
is effectively in
When the field effect transistor T becomes conductive again , { HEAD ~ the first capacitor C1 } is effectively in { TAIL ~ parallel } with the series circuit of the second diode D2 and the first coil L1
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH