Basic Qualification · B-003 Station assembly, practice and safety · B-003-003-009
Dans un récepteur, quel étage règle le volume du son?
- ALe discriminateur de fréquence
- BL'amplificateur de fréquence intermédiaire
- CL'amplificateur audiofréquence
- DLe limiteur
Correct answer: C — L'amplificateur audiofréquence. Question tirée de la banque officielle d'ISDE.
Why
The volume control adjusts the strength of the audio signal that drives your speaker, and this happens in the AF amplifier, where AF stands for audio frequency. 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