So in an effort to relive my misspent childhood I'm trying to generate a few tens of kV by pulsing a coil but I'm not having any joy experiencing the jolts I would have expected. I'm using a MOSFET (BUZ100 if it makes any difference) the gate of which is pulsed by the output from a 555 timer at about 6Hz; ('on' about 20% of the time) The coil is being pulsed just fine according to the measurements I've made, but I can't detect any HT at all. I believe this is due to the use of a snubber diode I've connected across the source/drain to protect the FET. I'm sure I could get some shocks if I removed that diode, but then the FET would be blown to bits, I'd imagine. The relevant circuit fragment (I don't have one of those ascii editors so I'll have to describe it) is FET source connected to GND, its drain connected to one side of the coil (2H; 200Ohms dc resistance) then other end of coil to +12V, with the diode across from ground to drain as previously described ('p' of 'pn' junction of diode to GND of course). How can I rearrange this circuit to give me the jolts I desire? There must be a simple way of doing this, surely? Would a tap off the coil work?