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AhaBulb: Stuff Everyone Should Know · ahabulb.com/ham-ptt-input-function

What does a transceiver's PTT input do when it is grounded?

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  1. Sends a transmit tuning tone
  2. Acts as the input for a CW key
  3. Switches the radio from receive to transmit

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References

  1. NCVEC 2026-2030 Technician Question Pool (February 19, 2026 errata) ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf Checked 2026-10-09.

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