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T9A08
Why is a 19-inch-long vertical antenna often used on 2 meters?
Pick an answer to check it.
Answer: C. It is a resonant quarter-wave
A 19-inch vertical is a resonant quarter-wave on 2 meters. Quarter-wave feet = 234 / MHz, so 234 / 146 = 1.60 feet, and 1.60 x 12 = about 19.2 inches. A half wave would be about twice as long (about 38 inches).
Tip: 2 m quarter wave: about 19 inches.