Basic Qualification · B-003 Station assembly, practice and safety · B-003-006-002
In a single-sideband transmitter, why is the speech amplifier needed?
- A Microphones usually have a low power output
- B To match the balanced modulator's output impedance
- C The sideband filter requires a large audio signal to work
- D To improve signal fidelity
Correct answer: A — Microphones usually have a low power output. From the official ISED question bank, verified word for word.
Why
Microphones capture your voice as very weak electrical signals that are too faint to drive the transmitter's next stages effectively. 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.