Hi, no the schematic is not like the one I'm fixing. On mine, the pulse is sent through a transformer to a circuit of diodes, caps, and resistors to the gates.(I think that this is the bootstrap) There is an identical circuit for each gate. On the low side, the gate signal is negatively biased -150 VDC but on the high side it is not biased at all. I would expect it to be positively biased 150 VDC, no? I was measuring the voltage peak to peak, I guess my gate voltage is actually 10-12 volts. My mistake.
Colin