Hello, Iam confused with all the Modell Numbers. My new Fisher X-100-A / Serial: 64333E What Modell is this? Is it a X-100-A, or KX-90, or ?? I found Shematics for the Modell's X100, X100A, X101 abd X202, but not one match. He is the one with EL84/7189 (Original Fisher). Question: Is it possible to resolder the Main Power Supply, for 220V ?