Aluminum dryer duct held together with flat plates top and bottom works
just fine for a cheap and dirty solution.
On Fri, Aug 3, 2018, 8:47 AM Tedd Dillard <tedd.dillard@xxxxxxxxx> wrote:
> Gentlemen,
> I am in the process of constructing a Tesla Coil with a 10 kva transformer.
> I am a long way from complete and still in the design phase for most
> components.
> From what I have read the top load needs to be fairly large for a machine
> the size I am working on.
> I have read many post on the construction of the top load and see many
> different ways to construct a serviceable device.
> But one thing that has not really been discussed but sometimes referred to
> is the shape.
> Most of the designs are attempts at making a toroid.
> From what I understand the top load needs to do three things.
> 1. Provide the capacitive load to the air.
> 2. Prevent breakout.
> 3. Prevent strikes to the secondary coil.
> I can see where a complete toroid can do all three but it seems to me that
> the inside of the toroid is unnecessary.
> My question is will a shape like a jelly donut work just as well?
> A toroid but with the hole covered with a flat surface at the top and
> bottom.
> The only curved surfaces are on the outside.
> I can see that the difference is surface area affects the calculated
> capacitence but that could be considered in the design.
> The flat surface of the top and bottom areas would resist breakout just as
> well as a pure toroid.
> I raise the question because I can see the construction of a large top load
> could be simplified and possibly even be constructed in segments for
> storage and transportation.
> I would appreciate any comments please.
> Teddy
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