Basic Qualification · B-006 Feedlines and antenna systems · B-006-010-011
When using a ground mounted vertical HF antenna, what can you do to reduce ground losses?
- A Improve the impedance match at the base
- B Raise the antenna one eighth of a wavelength
- C Install a wire ground system (radials) the antenna base
- D Use an insulator with a higher breakdown voltage
Correct answer: C — Install a wire ground system (radials) the antenna base. From the official ISED question bank, verified word for word.
Why
A ground mounted vertical antenna needs a good electrical connection to the earth to work efficiently, but dry soil often resists current flow, causing energy loss as heat. The full explanation — and one for every question — is in Pro.
Practise this section
Getting the signal out: antennas, feedlines, SWR, baluns, matching, and why antenna length depends on frequency.