Deep Dive: G4C02
The correct answer is C: Arcing at a poor electrical connection. A cause of interference covering a wide range of frequencies is arcing at a poor electrical connection. Arcing creates broadband noise that covers many frequencies. For amateur radio operators, this is a common source of wideband interference. Understanding this helps when troubleshooting interference.
Why Other Answers Are Wrong
Option A: Incorrect. Not using a balun doesn't cause wide-range interference - it might cause common-mode current, but not wideband noise. Balun issues are more specific. Option B: Incorrect. Lack of rectification doesn't cause interference - rectification would actually create interference, not lack of it. This doesn't make sense. Option D: Incorrect. Using a balun to feed an unbalanced antenna doesn't cause wide-range interference - it might cause some issues, but not wideband noise. Balun issues are more specific.
Exam Tip
Wide-range interference cause = arcing at poor electrical connection. Think 'A'rcing = 'A'cross 'W'ide frequencies. Arcing creates broadband noise covering many frequencies. Not balun issues, not rectification - just arcing at poor connections.
Memory Aid
Wide-range interference cause = arcing at poor electrical connection. Think 'A'rcing = 'A'cross 'W'ide frequencies. Arcing creates broadband noise covering many frequencies. Common source of wideband interference.
Real-World Example
You hear interference across a wide range of frequencies. Investigation reveals a loose connection in your power wiring that's arcing. The arcing creates broadband noise that covers many frequencies. Tightening the connection eliminates the interference. Arcing at poor connections is a common source of wideband interference.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G4C
Reference: 2023-2027 Question Pool · G4 - Amateur Radio Practices
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G4C topic.