Basic Qualification · B-003 Station assembly, practice and safety · B-003-017-002
What device converts 120 volts AC to 12 volts DC?
- A Low-pass filter
- B Inverter
- C Power conditioner
- D Power supply
Correct answer: D — Power supply. From the official ISED question bank, verified word for word.
Why
A power supply is the device that changes the 120 volts AC from your wall outlet into the 12 volts DC needed to run most amateur radio gear. 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.