Re: Tuning with two torids


Bill Langston here, the pig is in it's pen and wallowing happily --

Has anyone, that you know of, successfully used an actuator up the center
of the secondary (found a work-around on the inner spark issue)? I would
like to give that a try, and avoid reinventing the wheel if I can.

In your photo-resistor idea, were you thinking of a package wholly
mounted on the top of the secondary, below the lower torrid? If so, did
you have some thought about powering it.

Thanks for your time.
Bill Langston

Tesla List wrote:

> Original Poster: "Jeff W. Parisse" <jparisse-at-teslacoil-dot-com>
> Terry & All,
> > > I would think the simplest way to move a top toroid up and down
> > >would be to run a plastic rod (like PVC) up the center of the
> > >primary, secondary, and first top terminal
> > Be careful doing this. I just had a spark go down the middle of my
> > secondary along a piece of pvc. It left a gouge and a burn mark all
> > the way down and then jumped to the ground connection.
> This is a VERY common failure mode. Many builders employ
> interior baffles on their secondary coil forms to prevent
> internal flashover. Having a structure that violates the internal
> insulation of a secondary is not the way to go IMO.
> The linear drive device that Terry referenced might work
> if it is rigged so as to be self-powered, shielded and remote
> controlled.
> A simple up/down control can be made using photoresistors
> (yes, low tech CadSulfide) and a laser pointer. Located on the
> "toroid height adjuster" will be two targets: UP and DOWN.
> Hit either target with a laser pointer and Bob's your uncle. No
> tether (fiberoptic or otherwise) and no 5v logic. True, you'd
> have to have good aim but that's what tripods are for...
> (Here we go...TWO laser pointers mounted on a common
> tripod. Up and down controls at your fingertips...)
> Jeff Parisse
> www.teslacoil-dot-com