Original poster: "Mark Broker" <mbroker@xxxxxxxxxxxxxxxx>
I dug up this post in the archives. I know there is more information in the archives if one goes searching. http://www.pupman.com/listarchives/2003/January/msg00844.html
As I said when I suggested his TC a week or two ago as an exception to this Zo sweet spot, Marc used a lot of atypical design parameters with this TC that may have lead to the extraordinary performance he claimed.
Cheers!
Mark Broker
Mark,
I tried a coil one time that had about 2500 turns or so, but it was inefficient. I didn't spend much time working on it though. Maybe someone will do further experiments at some point.