Trouble Seeing Output on Scope and Convergence Problems

[TCjr]

Hi,

Having trouble with the attached circuit. It seems to have quite a few convergence issues, and on the rare times it dose work I can't seem to see the high-speed pulse being generated. any assistances would be greatly appreciated.

tks, Terry

[Tien_P]

Hi Terry,

I replaced the timer with the LM555CM, this part seems to work better.  Also, I replaced the MOS Q1; I don't think the part you selected like being connected to the 800V source.

The attached circuit is simulating.