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What does the VFO circuit in a transceiver do?

It sets the receive and transmit frequency.

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  1. Provides automatic frequency control
  2. Generates and demodulates SSB signals
  3. Sets the receive and transmit frequency ✔

Why: VFO means variable frequency oscillator. Turning the main tuning knob changes the VFO, which sets where you listen and transmit.

Huh, didn't know that: Many radios have two VFOs, often labeled A and B, so you can jump between two frequencies.

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My VFO knob and I go way back. We've been through a lot of changes together.
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References

Answer: Sets the receive and transmit frequency. VFO means variable frequency oscillator. Turning the main tuning knob changes the VFO, which sets where you listen and transmit.

  1. NCVEC 2026-2030 Technician Question Pool (Feb 19, 2026 errata) ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf
    T7A11 (A) What is the function of the Variable Frequency Oscillator (VFO) circuit in a transceiver? A. Set the receive and transmit frequency
    Checked 2026-10-09.

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