Re: True Toroid Capacitance

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


To clarify:  the major (outer) dia. of the toroid should always be equal to
or greater than twice the dia. of the sec. coilform.  Sorry --- I should
have put this in my original post.

Ratio 2:1 works very good for most modern coil design.  3:1 and 4:1 (or
more) are used in systems where a lot of power and primary capacitance is
readily available.  Usually this is a cost factor that keeps most designs to
the 2:1 ratio or close to it.

Example, a 8-12 inch dia. sec coil works good with a 24 x 6 inch major dia.
toroid.

Dr. Resonance

 >         most of your posts concerning ratios are confusing, since every
toroid
 > has two diameters (and there are two different commonly used ways to
measure
 > the larger one, center-to-center and outside to outside)), and the
secondary
 > has two measurements (length and diameter).