SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/hamg-qrl-check

How can you check that a clear-sounding frequency is not in use before calling CQ?

Ask if it is in use: "QRL?" on CW, or say it on phone, then your call sign.

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  1. Listen for exactly 2 minutes
  2. Send "QSY" on CW or announce the frequency is in use
  3. Ask if it is in use, then give your call sign ✔

Why: A weak station on the frequency may be inaudible to you. Sending QRL? on CW, or asking if the frequency is in use on phone, gives that station a chance to answer.

Huh, didn't know that: In Q-code, QRL? means "Are you busy?" or "Is this frequency in use?"

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References

Answer: Ask if it is in use, then give your call sign. A weak station on the frequency may be inaudible to you. Sending QRL? on CW, or asking if the frequency is in use on phone, gives that station a chance to answer.

  1. NCVEC 2023-2027 General Class Pool and Syllabus (6th Errata, Feb 4 2026) ncvec.org/downloads/General%20Class%20Pool%20and%20Syllabus%202023-2027%20Public%20Release%20with%206th%20Errata%20Feb%204%202026.pdf
    ask if the frequency is in use
    Checked 2026-10-11.

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