Basic Qualification · B-003 Station assembly, practice and safety · B-003-017-006
Apart from efficiency, what is one advantage of a switching (switch mode) power supply over a linear power supply?
- A Lower risk of radio frequency noise
- B Different simultaneous output voltages
- C Simpler to repair
- D Reduced physical dimensions and weight
Correct answer: D — Reduced physical dimensions and weight. From the official ISED question bank, verified word for word.
Why
Switching power supplies operate at very high frequencies, which allows them to use much smaller transformers and components than the heavy, low-frequency transformers found in linear supplies. 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.