Tesla coils are awesome. But if you’ve ever built ... There’s the main rotary axis, and a wire-guide that moves along it ensuring the coils are wrapped tightly without gaps.

[Zach Armstrong] presents for your viewing pleasure a simple guide to building a solid-state Tesla coil. The design is based around a self-resonant setup using the UCC2742x gate driver IC ...

And he said, since I have this wave guide, I can repeat what I am ... The second thing is, it is a frequency transformer. Tesla, with the Tesla coil, changes one frequency to another frequency.