Basic Qualification · B-003 Station assembly, practice and safety · B-003-008-002
What is the purpose of the transformer in a linear power supply?
- A Convert the AC mains voltage up or down as required and provide isolation
- B Convert alternating current into direct current
- C Smooth out the pulsating direct current
- D Ensure that the voltage stays constant when a heavy demand is placed on the supply
Correct answer: A — Convert the AC mains voltage up or down as required and provide isolation. From the official ISED question bank, verified word for word.
Why
A transformer takes the high voltage from your wall outlet and changes it to a safer, lower level needed by your radio gear, while also creating a vital safety gap that keeps you isolated from dangerous mains electricity. 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.