Re: Small, Medium, Large coil sizes

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

Original poster: "Greg Leyh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <lod-at-pacbell-dot-net>


Original poster: <A123X-at-aol-dot-com>

 > What do all of you consider to be a mini coil, a small coil, a medium 
coil, a
 > large coil, a very large coil, and a beastly coil?

It might be possible to assign some absolutes to this question.
There are some fundamental limits on maximum coil size for a
standard, disruptive TC, designed to produce long arcs.  There
will also be a set of practical limits for the *smallest* possible
coil size, though these limiting factors are likely to be based
on quite different parameters, such as the secondary Q as the
shrinking coils' frequency rises.

Rough calculations for a smallest possible (practical) coil yield:
Secondary --   0.3"(D) x 0.9"(H)
Input Power -- 15W (approx)

More thorough calcs for a largest possible practical coil:
Secondary --   22ft(D) x 110ft(H)
Input Power -- 5,7oo,oooW

Given these rough limits, one could propose that:

A small coil is one that operates near the smallest practical limit of 15W.

A large coil is one that operates near the largest practical limit of 5.7MW.

A medium-sized coil is one that operates near the geometric mean of these
small and large limits, which for this example would be around 9246W.

A beastly coil is one that is very difficult to deal with, either by its
size or by its design.


-GL