I once made a big, smooth toroid out of a vinyl swimming pool float. I inflated it as hard as I dared and covered it with several layers of paper mache followed by many strips of aluminum HVAC tape. I then polished it to a very smooth, chrome-like finish. It worked like a champ on my 5kVA coil. It took a lot of time and effort, but it was very cheap and much smoother than dryer duct. If memory serves me it had a chord of 9" and a diameter of 30". It has held up well too. It is still gathering dust out in my barn. No dents yet!
Cheers,
Greg
On Wednesday, April 1, 2015 7:12 AM, Timothy Gilmore <tdg8934@xxxxxxxxx> wrote:
Now that I have my mid sized Tesla coil working with 3 feet averaging and
some over 4 feet using 2 15kv 60mA NSTs... I would like to focus on
building a bigger Toroid top load. Currently I'm using 6" dryer ducting
with foil pizza pans in the middle. As most dryer ducting designs go, it's
not "smooth" and I get a lot of side sparks. I'm thinking if I can build
one with 8" dryer ducting or larger and figure out a way to make it smooth
it should create less but longer thicker sparks.
What are coilers doing about this problem? I'm not going to spend $400+ for
a machined one that's smaller. I'm limited on tools with a hacksaw and
electric drill for the moment. If dryer ducting is to be used, what are you
guys using to join the ends together (just tape)?
Thanks,
Tim
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla