Deep Dive: G2A12
The correct answer is B: Transmit audio or microphone gain. The control typically adjusted for proper ALC (Automatic Level Control) setting on a single sideband transceiver is transmit audio or microphone gain. ALC prevents overmodulation by controlling audio input level. Adjusting microphone gain controls how much audio drives the transmitter, which affects ALC. For amateur radio operators, proper ALC setting ensures good audio quality without distortion. Understanding this helps optimize SSB operation.
Why Other Answers Are Wrong
Option A (RF clipping level): Incorrect. RF clipping isn't typically user-adjustable - it's an internal circuit function. ALC is controlled by audio input, not RF clipping. Option C (Antenna inductance or capacitance): Incorrect. Antenna tuning doesn't affect ALC - ALC is about audio input level, not antenna matching. Option D (Attenuator level): Incorrect. Attenuators are for receive, not transmit ALC. ALC is controlled by transmit audio/microphone gain.
Exam Tip
ALC setting = adjust transmit audio or microphone gain. Think 'A'LC = 'A'udio 'L'evel 'C'ontrol. Microphone gain controls audio input, which affects ALC. Not RF clipping, antenna tuning, or receive attenuator - just microphone/audio gain.
Memory Aid
ALC setting = adjust transmit audio or microphone gain. Think 'A'LC = 'A'udio 'L'evel 'C'ontrol. Microphone gain controls audio input, which affects ALC. Standard control for proper ALC setting.
Real-World Example
Your SSB transceiver shows ALC is too high (overmodulation). You reduce the microphone gain, which reduces the audio input level. This lowers the ALC reading, preventing overmodulation and distortion. Adjusting microphone gain is the standard way to set ALC properly.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G2A
Reference: 2023-2027 Question Pool · G2 - Operating Procedures
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G2A topic.