A Third Generation?

As Tesla coil building evolves, there is greater appreciation of matching of the fundamental frequency of the primary pulsing system with the resonant frequency of the secondary. This may be more manageable with solid-state pulsing systems than with spark-gap systems, as we shall see.

Generation III

The Tesla coil I'm calling Gen III is inspired by the coil demonstrated by the Nikola Tesla at his London Lecture of 1892, and, who knows, if this lecture and the drawings published with it (in 1894 by James Commerford Martin) had been more widely circulated through subsequent decades, then this model, through more difficult to construct, may have become the experimenter's standard.

The proposed Gen III Tesla coil is a radical departure. Its format has more in common with the old induction coil than with any of the traditional single-layer helicals. It is a multilayer coil. The secondary is wound right on top of the primary, closely coupled, not loosely.