SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/ham-19-inch-quarter-wave

Why is a 19-inch-long vertical antenna often used on 2 meters?

It is a resonant quarter-wave on that band.

  1. It is a resonant half-wave
  2. It has high gain
  3. It is a resonant quarter-wave ✔

Why: A full wavelength on 2 meters is a bit under 7 feet. A quarter of that, trimmed slightly as real antennas need, is about 19 inches.

Huh, didn't know that: A 5/8-wave whip has more gain than a quarter-wave for VHF and UHF mobile use.

The dad joke
Why did the 19-inch antenna feel so complete? It was a quarter of the way to greatness.
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Sources

  1. NCVEC 2026-2030 Technician Question Pool (Feb 19, 2026 release) https://www.ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf

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