# Re: Sphere/Toroid Comparison Chart

Original poster: "Luc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ludev-at-videotron.ca>

Hi All

Is it possible ? If you look at the chart; toroid of diameter
from 8" to 16" have a value of C in pF greater for 4" d2 than for
6" d2. I could be wrong but it seem illogic. If these value are
good could you explain me why a smaller area of terminal could
have a bigger value of capacitance. Tx.

Cheers

Luc Benard

> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> <Mddeming-at-aol-dot-com>
>
> Hi All!
> I found this on an old paper spread sheet. No reference as to source. I
> think
> the relative sizes are right, but can't swear to it.
> C-C          Chord Nom.
> Toroid     Toroid        Cap       Equiv.Diam. Equiv.Diam.
> d1(inches) d2(inches) pf         sphere (in.)  sphere (m)
>
> 8                4.00 7.723         5.47 0.1390
> 8               6.00 4.540         3.22 0.0817
> 10               4.00 10.675         7.56 0.1921
> 10             6.00 8.243         5.84 0.1484
> 12                   4.00 13.262         9.40 0.2387
> 12            6.00 11.585         8.21 0.2085
> 14            4.00 15.574         11.04 0.2803
> 14                   6.00 14.605         10.35 0.2629
> 16             4.00 17.675         12.53 0.3181
> 16                6.00 17.359         12.30 0.3125
> 18                4.00 19.607         13.89 0.3529
> 18             6.00 19.893         14.10 0.3581
> 20             4.00 21.402         15.17 0.3852
> 20             6.00 22.245         15.76 0.4004
> 22             4.00 23.083         16.36 0.4155
> 22             6.00 24.444         17.32 0.4400
> 24             4.00 24.668         17.48 0.4440
> 24             6.00 26.512         18.79 0.4772
> 26                4.00 26.170         18.55 0.4711
> 26             6.00          28.469         20.18 0.5124
> 28             4.00 27.601         19.56 0.4968
> 28             6.00 30.329         21.49 0.5459
> 30                4.00 28.969         20.53 0.5214
> 30                6.00 32.103         22.75 0.5779