I change all parts of the schematic strictly as required by #3 ( of wvmarle) schematics with the exception of Mosfet which is IXFQ50N60P3 instead of IRF730 and part # for Q2 is 2N4403. I include the coil L1 and L2 in the circuit too. I tested and it was showing 4.6 A up to 120V input to the bridge rectifier. Vgs at the Mosfet was 5.6V . But when i analyze the attached picture of the oscilloscope seamed to me that I do not have 2ms pulse and this high picks are 180 degree apart .When I increase the voltage above 120V AC ,my Mosfet stop working and I have to replace with new one. I am confused and do not know what to check next.
