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Re: Terry's remote tuning idea...
Hi Jeff,
Not as scientific as Terry's program and it depends a lot on
the relative size of topload and coil, but I would say about 5% from
sitting right on the windings to being several feet off if the topload is
pretty big. The smaller the topload relative to the coil, the bigger the
effect.
Regards,
Malcolm
On 22 Mar 00, at 21:17, Tesla List wrote:
> Original Poster: "Jeff W. Parisse" <jparisse-at-teslacoil-dot-com>
>
> TCML,
>
> A while back, Terry Fritz helped me install our Model 9J Tesla coil
> into the PepsiCenter arena in Denver. The Model 9J operates in both
> rightside up and upside down configurations. Because Fsec is different
> for different installations, Terry suggested I ease installation by
> installing
> a device that would raise or lower the toroid to change Fsec.
>
> After running the Model 9J for several months, I've decided that the
> toroid is much too low for rightside up operation. I am in the process of
> machining an aluminum disk and aluminum standoffs to raise the
> toroid and I remembered Terry's suggestion.
>
> The disk (23" dia.) will be mounted ~6" above the secondary (20" dia.)
> using aluminum standoffs and will act as a corona shield and mounting
> platform. The toroid will be mounted ~6" above the disk using aluminum
> standoffs. The disk "could" be used to mount a motorized lifting
> mechanism for the toroid thereby facilitating Terry's idea.
>
> Question: The 9J is a big coil (shipping weight 1,900 lbs.) and difficult to
> haul out and test. Does anybody with experience raising and lowering
> toroids have an idea as to the Fsec shift I can expect? I'll be able to test
> toroid height vs. Fsec in a few months. For now, I'm just looking for
> a reasonable ballpark.
>
> Jeff Parisse
> www.teslacoil-dot-com
>
>
>
>
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>
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>
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> Jeff W. Parisse
> Director, kVA Effects
> www.teslacoil-dot-com
>
>