Are you hooking the red/yellow (center tap) to the chassis or the the signal ground path (opposite side of cap on B+)? The CT (or any of the HV supply) should not be in contact with the chassis. Are you using a 3-point (hot/neutral/ground) electrical connection from the wall outlet? I should have pictures of Guinevere up tonight. Amazing, FedEx actually found my house on the first try today and brought dad (OK, mom) a new toy ......Colin