Maybe I can't remember your chamber configuration, Tom. I assume you are in a bell jar or plastic chamber and therefore require an outer grid. Spherical metal fusors don't need one.
If you are using an insulated/non-conductive chamber, then why insulate at all? You are naturally insulated. You will need to bring one connection out to be the high voltage positive/ground connection.
If you are using a cylindrical metal chamber then, no, you will not need to insulate at all or bring out the lead. Just bolt the outer grid to the chamber walls making at least one good electrical connection. Remember, the outer grid or shell of all metal fusors must be at ground potential. The power supply positive must also be at ground to make the system work. Negative is hot.
The outer grid establishes the internal field of a fusor regardless of any outside metallic arrangement, provided it is also at the same potential.
Richard Hull
Created on Monday, May 14, 2001 4:16 PM EDT by Richard Hull