Technician exam question T9B03
Subelement T9, ANTENNAS AND FEED LINES· Group T9B
Why is coaxial cable the most common feed line for amateur radio antenna systems?
- A.It is easy to use and requires few special installation considerations (correct answer)
- B.It has less loss than any other type of feed line
- C.It can handle more power than any other type of feed line
- D.It is less expensive than any other type of feed line
WhyCoaxial cable is the most common feed line for amateur radio antenna systems because it's easy to use and requires few special installation considerations. Coaxial cable is the dominant amateur feed line mainly because it's simple to install, self-shielded, and doesn't require careful spacing from nearby metal the way open-wire line does, answer A. It doesn't have the lowest loss of any feed line (B, air-insulated hardline and open-wire line both beat it), it isn't the highest power-handling option (C), and it isn't necessarily the cheapest choice either (D), those aren't the reasons for its popularity.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
Related questions
- T9B01Which of the following connectors should be carefully taped for weather protection when used outdoors?
- T9B02What is the most common impedance of coaxial cables used in amateur radio?
- T9B04What is the major function of an antenna tuner (antenna coupler)?
- T9B05What happens as the frequency of a signal in coaxial cable is increased?
- T9B06Which of the following connector types is most suitable as an RF connector for frequencies above 400 MHz?