How to build a Bedini SG according to the specs in Bedini SG - The Complete Beginner's Handbook Bedini SG - The Complete Beginner's Handbook

This is the kit assembly by Peter Lindemann, but even if you don't have a kit, this will address many issues that you will encounter even if you make a homemade one.

Here is the video - How to Build a Bedini SG Energizer - YouTube