Re: [TCML] Bipolar coils

[<mrapol@xxxxxxxxxxxx>]

I've built a 4 bipolar coils with horizontal secondaries. Though you will 
find old references to basically winding two short vertical coils and then 
joining them at the base to create a horizontal coil, that's an elaboration 
that isn't necessary. Just wind a secondary of normal style and proportions 
and it will work fine.

As far as top loading, in my limited experience horizontal coils do not 
require large masses on the ends of the secondaries--I use brass balls of 
3/4 to one inch in size. My largest horizontal coil uses two stainless steel 
canisters about 5x3 inches, with steeply rounded edges.

PBT

----- Original Message ----- 
From: "Grant Visser" <freeekyg@xxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Monday, April 11, 2011 4:54 AM
Subject: [TCML] Bipolar coils


> Hi again,
>
> I cannot seem to find a definitive resource for information on bipolar
> coil design methodologies so am hoping someone on this list will be
> able to help me out or point me in the right direction.
>
> I have a 2KW SSG coil that I want to convert into a bipolar
> configuration for environments where I have no access to a dedicated
> RF earth.
>
> For my purposes I am wanting to build a horizontal bipolar coil rather
> than the more common twin coil system. I remember reading somewhere a
> long time ago that the secondary coil needs to be wound in opposite
> directions from the centre point but cannot find that reference
> anymore???
>
> I am also unsure of how to go about the resonance calculations, 
> toploading, etc.
>
> Any help or advice greatly appreciated.
>
> Keep em sparks flying
> Grant
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