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- To: tesla-at-pupman-dot-com
- Subject: Touchy toroids
- From: tesla-at-america-dot-com (Bob Schumann)
- Date: Thu, 13 Mar 1997 07:55:57 -0500 (EST)
Howdy coilers I would like some feedback as to what others have done with their toroid construction using the available aluminum dryer ducting from the hardware stores. I am presently on my 5th one. My last one was my best one but it fell off recently and landed on the sharp pointed acrylic inverted-cone primary forms. It was toast. The way I had built it was by using some 40 pound monofilamnet fishing line and 'chain stiched' the ducting 2 ends together. All seemed okay but the fishing line was above the outside surface of the seam, so I smoothed aluminum tape around the seam and that seemed ok. For the center, I cut out a circle from the center of a cheap pie pan and drilled 4 holes in this metal disc at 12, 3, 6 and 9 o'clock. I used 4 titanum (free) wires and wrapped each wire around the toroid and locked it in place at the center disc with those little screw locks used to tighten on automobile throttle cables during adjustment. I just bought my new ducting. I came of with a stiching method that makes the toroid appear seamless. It is very hard to tell where the joining took place. There is no need to smmoth aluminum tape over the joint. Ok now for the question (sorry it took so long to get here) What other methods can I use for a center ? Someone had told me of 2 pie pans back-to-back but I can't imagine how the ducting will stay on the pans' edges. I find my self looking in kitchen stores and department stores and hardware stores looking for something to jump out at me. Service people at these stores ask me 'Can I help you find something?' or "What are you looking for?'. I always tell them that I will know what it is when I see it! Thanks, Bob Schumann tesla-at-america-dot-com http://www.america-dot-com/~tesla
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