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[TCML] Ring Style Toroid Design

I'm currently assisting in the construction of a ring type toroid (60" x 12") consisting of six tubes ( https://www.flickr.com/photos/33962508@N03/ ). Using Dr. Antônio Carlos M. de Queiroz's 'Inca' program ( http://www.coe.ufrj.br/~acmq/programs/ ) and, along with some help in its actual use from Bert Hickman, I now have a good idea of the expected toroid's capacitance. Now the six rings or hoops obviously need supporting in free space, and the conventional toroid method is a solid central disc in the horizontal plane supporting the outside minor diameter tube. I wondered just how much this solid central disc contributes to the shielding of the secondary, and if its replacement with support arms (like wheel spokes - but only four of them at 12, 3, 6, 9 o'clock) would leave the secondary more exposed to strikes, than if a solid disc had been used? (The effect on the capacitance value is believed to be small, so left out of the decision.)

Regards Phil


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