Basic Qualification · B-003 Station assembly, practice and safety · B-003-009-001
Quelle pièce d'une antenne Yagi à 3 éléments remplit principalement une fonction de soutien mécanique?
- ALe réflecteur
- BL'élément alimenté
- CLe directeur
- DLa perche ("boom")
Correct answer: D — La perche ("boom"). Question tirée de la banque officielle d'ISDE.
Why
The boom is the long metal bar that runs through the centre of the antenna, holding the reflector, driven element, and director in place so the whole structure stays rigid and aligned. The full explanation — and one for every question — is in Pro.
Practise this section
Station assembly, practice and safety is section B-003 of the Basic exam: Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.
Drill B-003 — free, no account