Basic Qualification · B-003 Station assembly, practice and safety · B-003-012-008
How should the microphone gain control be adjusted for voice operation on a single-sideband transmitter?
- A For 100% frequency deviation on voice peaks
- B For a dip in the drain or collector current
- C Such that the maximum range on the ALC meter is never exceeded on voice peaks
- D For full deflection of the ALC meter
Correct answer: C — Such that the maximum range on the ALC meter is never exceeded on voice peaks. From the official ISED question bank, verified word for word.
Why
Automatic Level Control, or ALC, is a circuit that prevents your transmitter from being overdriven, which causes distortion and can damage equipment. 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.