The Science Place in Dallas has a large Tesla coil, built by Lloyd Ritchie. It is wound on a fiberglass form 24 inches in diameter and about 6 feet long. The primary looks to be a couple turns of welding cable wound on the bottom of the secondary. It has no toroid top (Lloyd does not believe in top terminals) and makes 6 foot sparks.
[22k] Rear view of coil, showing primary connections.
Below are some miscellaneous pictures, including some hot flames, weird people, and a visit to Richard Hull's in Richmond Virginia.
[26k] The original rotary spark gap from the Nemesis Tesla coil.
[34k] Alex and Wild Bill connect transformers so they can be tested under
working conditions.
[14k] Another view of Austin in his robot suit.
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