by A look at a box of IGBTs and MOSFETs that I have salvaged from household electronics like microwave ovens, induction stoves, solar inverters, welding machines, car and battery charges and other common high power electronics with switching inverters.
The TO-247 IGBTs can be used in a DRSSTC Tesla Coil using the free half- and full-bridge inverter PCB designs here. If you like to see some larger IGBTs, check out where I salvaged large IGBT bricks from Industrial equipment.