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T4A12:What is an electronic keyer?

T4A12T4A

What is an electronic keyer?

Direct answer summary (2026-2030 NCVEC pool)

The official correct answer for T4A12 is A device that assists in manual sending of Morse code.

The key fact is A device that assists in manual sending of Morse code. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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