Hi Mark,
Thank you for the information! Yes it would be great if you could send me the spice model. I'm still searching for the simplest way to stimulate the effect without overcomplicated circuitry... I'm actually
looking into the good ol' fashion blocking oscillator circuits, which were made of several simple analog components. However, despite their incredible simplicity, they had good enough frequency stability to be used in the CRTs for old tube-type TV sets. The beauty of these circuits is that they have the natural disposition to use very little input power and output very thin, high voltage, pulses in a very wide range of frequencies depending on the selected components.
EM and I have been doing some experiments along these lines because we suspect that the early TPUs used these circuits.
Imagine taking the same circuit diagram I made earlier and replacing everything on the left side of the transformer with this:
(http://www.overunity.com/index.php?action=dlattach;topic=2873.0;attach=11586)
And yet this simple little circuit does the exact same thing to the control coil as my first, more complex one did. But this one uses much less power, and would be easy to work into the innards of a small TPU coil. In this case, the pulse width and high voltage output are taken care of for you, and phasing is a simple matter of controlling the triggering. This is an area I am looking into now. But if you say it is possible to make the three phases with a single input, that would make things even easier :).
"no mass circuitry involved in any of this stuff, it's just the knowledge of the coils and how they interact"
I prefer Occam's Razor myself ;).
God Bless,
Jason O