I'm aware of winding spacing and gap between first and last loops to reduce toroid interwinding capacitance.
Then there's the winding technique where 1/2 the toroid is wound, then the wire is pulled across the toroid to the beginning...and then the windings resume. (one layer)
Normally with a continuous winding, the first and last loops meet and this can be a heavy capacitance point due the Vdiff.
With the 'wire over the toroid' winding technique, 2 points of greatest Vdiff are created. Each point with 1/2 the Vdiff compared to the continuous winding.
I recall a while ago somebody posted that the 'wire over the toroid' technique can significantly lower inductor parallel capacitance.
I'm scratching my head on:
1) Does that 'wire over the toroid' have a name? 2) How does the 'wire over the toroid' technique reduce capacitance?? Is it the 2 points with 1/2 the Vdiff compared to normal winding? Is it that the electric field gradient shape has changed from 'O' to more like an '8'??D from BC