I need a 15kV or higher power supply. I found 2 used neon sign transformers rated at 10kv. Can I use both of them and connect the secondary coils in series to get 20kV?
I am not sure if 15kV isn't overkill. I need voltage that is big enough to ignite a spark between 5-10mm. I read that the value is 30kV/cm, so I assume 15kV is good enough to jump 5mm.