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Re: Terry's remote tuning idea...

Hey Jeff,

	My fabulous E-tesla5 program will do such calculations...  Just raise the
primary and secondary "far" off the ground as if the coil were in free
space.  There is control wiring and ground cables to the coil that may
affect the fields that could be programmed in too.  E-Tesla5 does handle
two terminals as is, so an extra disk is no big deal for it.  Since the 9J
is mounted on a grounded frame and such, the "details" may get tricky.
E-Tesla5 is designed to be modified as needed for such "tricky" stuff.  

I guess you already know the upside down in a big space numbers (82kHz if
memory serves) so the "typical" rightside up installation should be trivial
for E-Tesla5 as is.  Let me know if you need more info...

Cheers,

	Terry


At 01:48 PM 03/22/2000 -0800, you wrote:
>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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>Jeff W. Parisse
>Director, kVA Effects
>www.teslacoil-dot-com
>