Basic Qualification · B-003 Station assembly, practice and safety · B-003-003-006
In a superheterodyne receiver, which stage provides the final signal power to drive the detector?
- A IF amplifier
- B RF amplifier
- C Speech amplifier
- D Frequency multiplier
Correct answer: A — IF amplifier. From the official ISED question bank, verified word for word.
Why
The IF amplifier boosts the signal to a steady intermediate frequency after the first mixing stage, providing the final power needed before the detector extracts the audio or data. 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.