Pulse generator

[abhijitrkjr]

Hi everyone,
I need to build a high voltage pulse generator which could go upto few hundred volts on both polarity.
Earlier I had used Willamette phvsw-005v pulser circuit. But now those are not available anymore because the company doesn't exist anymore. Does anybody knows a good alternative for that? I would also be happy to build a simple PCB if somebody has a design. I am a newbie in electronics so don't suggest me anything that's very complicated.