Basic Qualification · B-003 Station assembly, practice and safety · B-003-008-005
What is the purpose of the regulator in a linear power supply?
- A Absorb the power produced by the supply
- B Ensure that the voltage stays constant when the demand on the supply varies
- C Convert the AC mains voltage up or down as required and provides isolation
- D Convert alternating current into direct current
Correct answer: B — Ensure that the voltage stays constant when the demand on the supply varies. From the official ISED question bank, verified word for word.
Why
A regulator acts like a smart valve that keeps the output voltage steady even when your radio draws more or less current, preventing the power from sagging or spiking as you switch between modes. 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.