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Re: New coil takes shape

Original poster: "Mike Tucknott" <michael.tucknott@xxxxxxxxxx>

Hi All

Well it was back to the drawing board, and I`v come up with an extra space
saving plan. I increased the distance between the layers to 25mm and they
will be inclined at 30deg. so yes we are talking conical twin stacked
with a foot print of 24" square and it will still have 20 turns.
This should also make taping a lot easer.

Cheers Mike Tucknott

>  > Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>
>  >
>  > Mike,
>  >
>  > I sincerely hope your 10 mm between layers is filled with something
>  > insulative than air!  If it's only air, than the outer part of your
> primary
>  > windings will surely arc to each other--very bad!
>  >
>  > Here is what Malcolm Watts sent me in 2000 regarding his stacked
>  >
>  > "The simplest approach is to design a spiral for about 30% of
>  > the total inductance needed and then build a second identical
>  > spiral and stack them with a spacing between spiral layers of
>  > about 4 times the conductor diameter which allows room for
>  > insulation.
>  >       I prefer to spiral one inwards and the other back
>  > outwards and tap inwards from the outer edge of the lower
>  > spiral and usually use a sheet of acrylic to separate the
>  > layers."
>  >
>  > --Steve Y.
>  >