All, Pictures from the Derby (UK) Teslathon are at http://www.extremeelectronics.co.uk/dby2008 Also There are some high speed videos of spark formation using a small SSTC and Mike Harrisons High Speed Video Camera which may be of interest to the group. These can be found at http://www.extremeelectronics.co.uk/other/sparkformation/ Cheers Derek