1) I use the F6DTSs. Seem fine. 30k/change. So does anyone actually know what the "difference" (s) is(are) between "F", "W", "WR", "DS", "DTS", "DTC", (e.g., F6DTS / WR6DS / W6DTC / ad nauseum)? I presume the "R" is "Resistor" (RFI suppression) code . . . -RDH