'Tony' signed, "QBE ZUT DE WA4JQS AR SK" In all of my references including "Operating An Amateur Radio Station" is the statement: "TWO CW PROSIGNS SHOULD NEVER BE USED IN SUCCESSION". That includes AR SK, AR K, as these were given as examples. There must be exceptions for traffic handling because AR B and AR N seem to be used in that case. Maybe the B and N are not true prosigns? 73, Roy K6XK