RE: primary angle

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>

On 16 Nov 2005, at 18:24, Tesla list wrote:

> Original poster: "Qndre Qndre" <qndre_encrypt@xxxxxxxxxxx>
>
> Hey Daniel,
>
> yes it does greatly affect the coupling. If you are using 0 degrees
> (flat spiral) you will have a very low coupling coefficient, which is
> the prefered configuration for coils. If you are using 90 degrees
> (cylindrial spiral) you will have a very high coupling coefficient
> which might result in racing arcs.
>
> Why doesn't every coil have a flat spiral if lose coupling is the
> configuration to be preferred?

Because you can achieve the same coupling constant with any coil
configuration. The determinants of k are *all* geometrical. Diameter
of primary coil, diameter of the secondary coil relative placements
are all involved. The nest argument for using a flat spiral is to get
the primary as far away from the business end of the secondary as
possible. It makes little difference if the secondary is tall.

Malcolm

> Regards, Q.
>
> ----Original Message Follows----
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Subject: primary angle
> Date: Wed, 16 Nov 2005 11:03:04 -0700
>
> Original poster: "Langer Giv'r" <transworldsnowboarding19@xxxxxxxxxxx>
>
> Hi, does the angle of the primary affect the coupling?  I have my
> primary set at 40 degrees to horizontal becuase it was the easyest to
> wind that way.  What should I do if angle is to high? thanks for input
>
> Daniel From Canada
>
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