Re: Toroid Height

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

Original poster: Bert Hickman <bert.hickman-at-aquila-dot-net> 

Tesla list wrote:
>Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net>
>Hi all,
>If one sets the toroid height too high above the secondary, the top turn 
>of the secondary is not shielded properly and breakout can occur from the 
>top turn.
>QUESTION:  What is the motivation for raising the toroid above the top 
>turn.  Why doesn't one put the tororid at the position of the top turn???
>Gerry R
>Ft Collins, CO
>
>.

Hi Gerry,

Raising the toroid increases the toroid-to-primary or toroid-to-ground 
distance, reducing the odds for downward strikes, particularly on systems 
using shorter coil forms. And, a larger major diameter toroid can be 
elevated a greater distance from the top turn while still providing 
adequate shielding. Raising the toroid can also be used to "tweak" tuning a 
bit, since it reduces the secondary-toroid resonant frequency a bit.

-- Bert --
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