Re: Tuning with two torids

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

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