MightyOhm.com

Hi,

I want to build a higher voltage version with 15mH inductor. But I don't know anything else about inductor, i.e. what tolerance should it be or maximum current. Anyone knows? Also source would be great, I wasn't able to find anything thru the hole on eBay

Try Digi-Key, Mouser, or Farnell.

You'll need a higher voltage switching transistor if you want to go much over 400V.

See this post: viewtopic.php?f=15&t=496

Panasonic ELC-09D103F
http://www.mouser.com/Search/ProductDet ... 2bQg%3D%3D
http://www.mouser.com/ds/2/315/AGB0000CE2-44829.pdf