Basic Qualification · B-003 Station assembly, practice and safety · B-003-003-002
In a VHF superheterodyne receiver, which stage must be designed to produce very little noise?
- A IF amplifier
- B Limiter
- C RF amplifier
- D Product detector
Correct answer: C — RF amplifier. From the official ISED question bank, verified word for word.
Why
The RF amplifier sits at the very front of the receiver, right after the antenna, so it handles the weakest signals before any other part of the circuit adds its own hiss. 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.