Basic Qualification · B-003 Station assembly, practice and safety · B-003-012-005
Why does the power amplifier of the SSB transmitter need to be linear?
- A Hum and noise are reduced
- B Power demand on the power supply is regulated
- C Power output variations due to voice peaks are reduced
- D Voice is unintelligible when amplified by a non-linear amplifier
Correct answer: D — Voice is unintelligible when amplified by a non-linear amplifier. From the official ISED question bank, verified word for word.
Why
Single Sideband (SSB) signals carry voice information in their shape, so if the power amplifier distorts that shape, the original speech becomes garbled and impossible to understand. 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.