The second coil L2 acts as a demagnetisation coil and has the effect that a part of the energy stored in the first coil L1 is charged into the second capacitor C2 via the third diode D3, as a result of which {HEAD ~ a negative voltage} is built up across {TAIL ~ the first resistor} R1 
is built up across
The second coil L2 acts as a demagnetisation coil and has the effect that a part of the energy stored in the first coil L1 is charged into the second capacitor C2 via the third diode D3 , as a result of which { HEAD ~ a negative voltage } is built up across { TAIL ~ the first resistor } R1
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH