Basic Qualification · B-003 Station assembly, practice and safety · B-003-003-009
In a receiver, which stage is controlled by the volume control?
- A Discriminator
- B IF amplifier
- C AF amplifier
- D Limiter
Correct answer: C — AF amplifier. From the official ISED question bank, verified word for word.
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
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.