[ARC5] An "Extra Class" Question:

[Neil]

> I can say with some confidence that this is not a question on a US ham
> exam. Neither the current or the previous 2 pools, dating back to 2004,
> has such a question.    I cannot speak to exams for other countries.

My research indicates that in the US, the Extra Class license was created
in 1951. The question may go back that far. And the person who asked
is a US ham.

73 de Neil ZL1ANM