Technician exam question T4A12
Subelement T4, AMATEUR RADIO PRACTICES· Group T4A
T4A12
What is an electronic keyer?
- A.A device for switching antennas from transmit to receive
- B.A device for voice activated switching from receive to transmit
- C.A device that assists in manual sending of Morse code (correct answer)
- D.An interlock to prevent unauthorized use of a radio
WhyAn electronic keyer is a device that assists in manual sending of Morse code. An electronic keyer takes input from a paddle and automatically forms correctly timed dits and dahs, assisting an operator in sending Morse code by hand, answer C. A describes a transmit/receive antenna switch, B describes voice-operated (VOX) switching, and D describes a lockout or access-control device, none of which is what a keyer does.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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