Desktop Coil ground? (fwd)
Sent: Tuesday, January 20, 1998 11:55 AM
Subject: Re: Desktop Coil ground? (fwd)
In a message dated 98-01-19 11:41:14 EST, you write:
I am in the process of designing/building a desktop coil for a friend
that is a physics teacher. Can you think of a better way to get kids
interested in science that arcs? :)
Anyway: It is pretty obvious that said coil must be small,and that is
not really a problem. What is a problem is how to ground the beast.
The instructor is not allowed to do little things like pound 8ft rods
into the ground outside the class.
[Proposed coil would be: 1"x10" 28awg, with a 2-3" spherical topload`
I will have to find ferrite toriods or sticks to build the protection
circut. At this frequency, he will be able to use a small cap, and yet
still get 5-6" arcs at least.
Michael Baumann Optivus Technology Inc.|Loma Linda University Medical Center
San Bernardino, California. (909)799-8308 |Internet: baumann-at-llumc.edu
Set it on a metal desk and use the desk for the ground plane. Or, bring a
roll of metal window screen material or light guage metal fencing (like
chicken wire with the small size holes) with you and spread it out on the desk
or on the floor under the coil. Should work just great. The screen should be
about the same size as a desk (3.5 x 5.0 feet ?) - it isn't critical.