Basic Qualification · B-003 Station assembly, practice and safety · B-003-004-005
In a basic CW transmitter, what does the power amplifier stage do?
- A It reduces distortion in the transmitted signal
- B It increases the transmitter's output power
- C It removes CW chirps from the transmitted signal
- D It multiplies the oscillator frequency to the operating frequency
Correct answer: B — It increases the transmitter's output power. From the official ISED question bank, verified word for word.
Why
A power amplifier takes the weak radio signal from earlier stages and makes it strong enough to travel far, which is exactly what increasing the transmitter's output power means. 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.