Hello,

I would like to make a simple DC power supply capable of giving around 4KV.
The current only needs to be small. Is it possible to make such a power
supply that runs off a 9V battery? If it is, can anyone give me some
pointers on making one, links to schematics would be even better. I'm
hoping I could use an off the shelf transformer, rather than making my own.

Thanks in advance,