I kept hoping someone who knew would jump in here, but nobody has. So, I'll do it. The K2 doesn't use the same pin for dit and dah. That's how A-DET works, on separate pins. The K1 does use the dual-voltage scheme, and I have no idea about the Kixie. However, the K2 will not care one whit. Dan / WG4S / K2 #2456