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Re: Two layer primary
why not wind it as a multi layer coil with 2 turns on each layer.. Here is
a sideways view of the primary with turn numbers.
I'd seriously consider using an "off axis" inductor for fine tuning too.
since the scheme below is going to make tapping a bit of a challenge
center of coil
From: Tesla list <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Wednesday, September 13, 2000 11:08 AM
Subject: Two layer primary
>I'm drawing a blank on how to begin this construction. The two layers will
>be joined at the center, so the two terminals will be at the outside of
>spiral. This means that the full primary potential (and much more if there
>are unused turns!) will be present across whatever gap separates the two
>spirals, so extra care must be taken to insulate against surface
>Obviously a Lexan plate must be built between the layers, and there can be
>no holes through this plate, as I suspect a flashover will find such holes.
>The no-holes rule complicates plans to mount the two spirals. I don't like
>the idea of gluing - it's potentially messy, and mistakes and changes are
>made and glue is kind of permanent. Short of using two back-to-back
>insulating disks with holes that are offset, I'm short of good ideas.