Original poster: "Luc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ludev-at-videotron.ca> Hi Last week one of you post a link of a study of the doubler circuit for MOT with scope analyze , instead of saving it I trash it . I start a study on that subject I'll try to make the best full wave doubler with your help. Please could you send me this link Luc Benard