Basic Qualification · B-003 Station assembly, practice and safety · B-003-005-010
In an SSB/CW receiver, which stage could include an audio band-pass filter?
- A AF amplifier
- B IF amplifier
- C IF filter
- D Limiter
Correct answer: A — AF amplifier. From the official ISED question bank, verified word for word.
Why
The AF amplifier, which boosts the sound signal after it has been converted from radio frequency, is the stage where an audio band-pass filter sits to shape the final sound you hear. 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.