Re: Large Van De Graaf Sphere

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
> 
> Original poster: "Vivek Babtiwale by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <dr_vek-at-yahoo-dot-com>
> 
> Have any of you had luck finding large Van De Graaf
> spheres for around $300? I wanted one that was 4 feet
> in Diameter. Every place I leeked at says $600 for a
> sphere made of aluminum. I considered making one out
> of aluminum strips but am wondering if the junction
> edges will cause a leakage problem. Does anyone have a
> web site where they've see a home made one that works
> and didn't take more than two weeks to make?

For a half-feet aluminum sphere in an unusual machine:
http://www.coe.ufrj.br/~acmq/myvdg.html
If you really want a 4 feet sphere, read the comments about safety
there.
The work and required equipment for making a large metal sphere is 
substantial.
I don't know of any site showing one, except for professional machines.

Antonio Carlos M. de Queiroz