Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net> Hi, Perhaps you could use a 10 x 10 array of the Geek group's 0.1uF 2000V caps for 20kV at 0.1uF. I think that would run $180. you may also use a 7 x 10 array of the 0.15uF caps for $157.5 That would be 20kV at 0.105uF. Cheers, Terry At 09:45 PM 5/27/2001 -0400, you wrote: >The peak for my transformer is around 21k >