Re: New coil takes shape

["Tesla list" <tesla@xxxxxxxxxx>]

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

Hi Steve

I`m was going to have a disk of 8mm acrylic between the two layers.
But it looks like I`m going to go back to the old drawing board and
redesign the primary.

Cheers Mike T


----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, April 30, 2006 5:20 AM
Subject: Re: New coil takes shape


> Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>
>
> Mike,
>
> I sincerely hope your 10 mm between layers is filled with something more
> 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 primary:
>
> "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.
>
> ----- Original Message -----
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Saturday, April 29, 2006 12:44 PM
> Subject: New coil takes shape
>
>
>  > Original poster: "Mike Tucknott" <michael.tucknott@xxxxxxxxxx>
>  >
>  > Hi All
>  >
>  > Thanks for the info on stacked primarys, our new coil is now well under
> way
>  > and should
>  > be finished in a week or two, only the primary still to build it`s
going
> to
>  > be two layers
>  > of ten turns made of 10mm thin wall tubing.
>  >
>  > 10mm between turns and 10mm between layers.
>  >
>  > Just one qustion do the two primarys need to be wound in oposite
direction
>  > ?????
>  >
>  > For some pics of our new coil goto:-
>  > http://freespace.virgin.net/michael.tucknott/bm6_coil_pictures.htm
>  >
>  > Cheers Mike Tucknott
>
>