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AhaBulb: Stuff Everyone Should Know · ahabulb.com/ham-spdt-switch-function

What is the function of an SPDT switch?

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  1. A single circuit is opened or closed
  2. Two circuits are opened or closed
  3. A single circuit is switched between one of two other circuits

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References

  1. NCVEC 2026-2030 Technician Question Pool, T6A08 ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf Checked 2026-10-09.

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