I build tesla coils and am moving on to my latest masterpiece, which will be a 2'x6' coil, and spending $800 on a pole pig is not an option for me, so I need to build it. I do not want to spend a month on research and calculations, and since it's duty cycle is so short, it need not be super efficient, just tough. Just some quick down and dirty specs. I will be starting with 240v, of course, as it will be high current. So, I would need the following- core size, primary wire gauge, secondary wire gauge etc. I expect I will use EI laminates, but am open to suggestions. Keep it simple for me, I don't need a bunch of theory to wind one transformer. This one will be loaned out to churches and schools for presentations. I am retired on social security, and we all know no tax money makes it to the schools, so basically you will be helping out with charity work for kids. Thank you, and god bless. some pics of my 120v 35amp coil