Basic Qualification · B-003 Station assembly, practice and safety · B-003-008-006
In a linear power supply, which stage typically requires a heat sink?
- A Voltage regulator
- B Transformer
- C Rectifier
- D Filter
Correct answer: A — Voltage regulator. From the official ISED question bank, verified word for word.
Why
The voltage regulator is the stage that needs a heat sink because it works by burning off extra energy as heat to keep the output steady. 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.