Hi All, While working on whys to get data for Paul Nicholson's TSSP project, I happened on a method of measureing the secondary profile of a secondary coil. The paper "A Method of Directly Measuring the Secondary Inductor Voltage Profile of Tesla Coils" is in HTML and Word97 format at: http://hot-streamer-dot-com/TeslaCoils/MyPapers/MyPapers.htm Cheers, Terry