I am a senior in high school and I am interested in learning about lasers. After a lot of reading I have decided to start with building a HeNe laser as it seems to be the simplest/cheapest to start. I purchased a laser tube ( http://www.lasers.shopeio.com/inventory/details.asp?id=653&cat=Lasers&sub= ) and now I need to build a power supply. I was wondering if anyone could help me with that? Thanks .