Basic Qualification · B-003 Station assembly, practice and safety · B-003-019-009
What is a safe method to discharge power supply filter capacitors?
- A Use an insulated shorting stick with an inline resistor
- B Use a long screwdriver with an insulated handle
- C Use an insulated wire with alligator clips on each end
- D Allow time for bleeder resistors to discharge the capacitors
Correct answer: A — Use an insulated shorting stick with an inline resistor. From the official ISED question bank, verified word for word.
Why
Power supply filter capacitors store dangerous electricity even after the radio is unplugged. 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.