Basic Qualification · B-003 Station assembly, practice and safety · B-003-004-002
Dans un émetteur à ondes entretenues (CW) élémentaire, quel type d'électricité alimente chaque étage?
- ACourant audiofréquence
- BCourant alternatif
- CCourant continu
- DCourant radiofréquence
Correct answer: C — Courant continu. Question tirée de la banque officielle d'ISDE.
Why
Each stage inside a basic CW transmitter needs steady, one-way power to work correctly, which is exactly what Direct current provides. 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