Piu~ I will give you a diagram, follow the instructions above. This is a single-tube pllsstc, which is difficult to tune. You need to adjust it slowly. For the coil frequency, go to the Science and Technology Forum to find software and calculate it yourself. Here are two, one uses irf630 and the other uses 460. The 630 is recommended here because it has a high frequency. If you want to make a simple one, make an exciter.