There are many replications out there for devices with CoP > 1.0. To achieve this condition, a lot of experimenting and tuning is required in a custom system. Because there is so much to learn, it is recommended that any beginner follow basic plans for circuits which have already been shown to work above 1.0. I recommend examining the work of John Bedini and Imhotep.
Google and YouTube will bring up a lot of information. But I recommend looking at Panacea University's Course Listings first. Download them and keep for reference.
http://www.panaceauniversity.org/courses.htm
Note: The lower portion of the page includes "Research" listings. These listings are for incomplete devices that have NOT been successfully replicated. If you are only interested in working devices, save yourself time and stick to the Courses listings.
Videos explaining John Bedini's SSG (Simplified Schoolgirl) circuit:
The most important thing that you need to first understand when you examine the SSG circuit is that there are essentially two circuits. Current is induced in the trigger circuit when the magnet passes the coil. This current flows through the transistor and when it is strong enough, it will cause the transistor to turn on. Then current will flow from the primary battery through the main circuit. When the magnet gets far enough away, the trigger circuit's lack of current causes the transistor to turn off, which turns off the main circuit. So effectively, the trigger-side of the bifilar coil in conjunction with the transistor are acting as a switching mechanism.
Imhotep has made a small Bedini SSG prototype that you can build with Radioshack parts and a brushless computer fan.
Searching YouTube for "imhotep bedini" will bring up the videos:
http://www.youtube.com/results?search_query=imhotep+bedini&aq=f
Notice that much of Imhotep's other work is an extension of Bedini's work. Imhotep is best known for his trick of showing how to use the Bedini circuit to light up fluorescent and other gas bulbs.
