I've been looking into this but haven't yet located when and where Dr. Tesla made the statement about 3, 6, 9. A lot of web sites say he said it. I would just like to know the context. Does anyone know the article/interview/paper and/or the date he said it?
I read that too somewhere. I have too many reference piles to sort through physically. I do know that Keely talked about it extensively in the makeup up of atomic structures. When I saw the La Point video I placed it with what Rodin has taught. That is why I did the demo on the color monitor screen to show the pattern. Like Keely stated it goes infinitesimally smaller. As you get closer and closer to the Bloch wall the compression would show up then as 12, 15, 18, 21. But I do not have the testing device to show that small of granularity.
As @Ex has shown in his latest Barkhausen test that the core needs to saturated to start with but at a very minute level so as to be receptive to any external atomic harmonics and not dominate the space with a static over powering field. So this points to working at the flux density area of the 3rd triune, the weak field. The Barkhausen test attempts and succeeds at getting a 3rd triune flux density area as small as possible to have that compression level at the mass of the winding as best as possible.
In regards to my current Keely-Hutchison build the closely coupled primaries would be incorrect in dealing with the weak field area of the secondary. These primaries are sitting in a high density area. The normal Tesla coils have the loosely coupled primary away from the secondary to work in the weaker field area. This explanation I have not found in the Tesla coil design documents. It is explained as capacitively coupled which is correct but that is where the explanation stops. The 3,6,9 field density area completes the design description. One can see my desgin goal for my current build being open to many changes pertaining to the ability to adjust many more parameters than just a limited number of things dealing with tuning to achieve an air discharge.