Thread-topic: **External Email** Re: [TCML] Topload position
I've believe a general starting point is the centerline of torus above the top turn by 1.5x secondary diameter, but I'm sure this is very general and doesn't take into consideration toroid size (minor and major diameters).
-----Original Message-----
From: Tesla <tesla-bounces@xxxxxxxxxx> On Behalf Of Adam James
Sent: Wednesday, January 27, 2021 9:45 AM
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: **External Email** Re: [TCML] Topload position
Should I understand then, It is a"trial & error" thing? Move the toroid up for best performance until I get corona from the top turns, then down until corona stops?
AJ
On Wed, Jan 27, 2021 at 10:33 AM Steve White <steve.white1@xxxxxxxxx> wrote:
> The top load serves 3 purposes:
>
> 1. Provide capacitance for the secondary circuit 2. Provide a smooth
> surface to build up charge 3. Provide EM shielding for the top turns
> of the secondary coil to prevent corona
>
> The toroid should be placed just high enough above the secondary coil
> to prevent corona and discharges from emitting from the top turns of
> the secondary coil. In addition to causing power loss, corona can
> damage the insulation of the top turns. Since toroid height also
> affects capacitance, you may have to re-tune your coil after movement.
>
> Steve White
> Cedar Rapids, Iowa
>
> ----- Original Message -----
> From: "Adam James" <adamjamesarmy60@xxxxxxxxx>
> To: "tesla@xxxxxxxxxxxxxxxxxx" <tesla@xxxxxxxxxx>
> Sent: Wednesday, January 27, 2021 7:37:16 AM
> Subject: [TCML] Topload position
>
> I have viewed hundreds of TC pictures and it has become apparent to me
> that the placement of the toroid in respect to the top of the
> secondary is all over the map!
> so, WHAT determines where the topload should be placed?
> AJ
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> Tesla mailing list
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>
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