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Re: Primary size
Tesla List wrote:
>
> Original Poster: "Jim Lux" <jimlux-at-jpl.nasa.gov>
>
> I have heard (not having done extensive experiments myself) that having the
> diameter of the primary be comparable to the height of the secondary is
> good from a field distribution standpoint. HOWEVER, this probably really
> applies to smaller table top coils, where the primary is serving as a
> counterpoise for the top load. Electrum had the primary inside the
> secondary, for instance. It is probably more an issue of coupling and
> insulation (preventing arcing from primary to secondary). The coupling
> issue is, in turn, an issue of charging currents for the primary circuit
> (more current means you can use higher coupling)
Jim and all
The secondary size of new new coil is going to be 9.25" by 40" so
a primary dia comparable to secondary hight is out.
What I need is a formular to calc the primary size so I can keep it
as small as possible and still be tuneable.
Cheers Mike Tucknott
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