Where should a lightning arrester be installed in a coaxial feed line?
The correct answer is D: On a grounded panel near where feed lines enter the building. A lightning arrester should be installed on a grounded panel near where feed lines enter the building. This location provides protection by diverting lightning energy to ground before it can enter your station equipment. The arrester must be well-grounded and located at the entry point. For amateur radio operators, proper lightning protection is essential for equipment safety. Understanding arrester placement helps protect your investment from lightning damage.
Exam Tip
Lightning arrester = at building entry on grounded panel. Think 'L'ightning 'A'rrester = 'L'ocation 'A't entry. Protects equipment by diverting lightning to ground before it enters. Not at transceiver, antenna, or power panel.
Memory Aid
"Lightning arrester = at building entry on grounded panel. Think 'L'ightning 'A'rrester = 'L'ocation 'A't entry. Protects equipment by diverting lightning to ground. Must be well-grounded."
Real-World Application
Your feed line enters your house through a wall. You install a lightning arrester on a grounded panel right at that entry point. If lightning strikes your antenna, the arrester diverts the energy to ground before it can travel down the feed line and damage your transceiver and other equipment inside. The arrester must be well-grounded to work properly.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Installing at the transceiver output doesn't protect the feed line or equipment - lightning can still enter through the feed line and damage equipment before reaching the transceiver.
Option B: Incorrect. Installing at the antenna feed point doesn't protect equipment inside - the arrester needs to be at the building entry to protect interior equipment.
Option C: Incorrect. Installing at the AC power panel doesn't protect RF feed lines - that's for power line protection, not antenna feed line protection.
题目解析
The correct answer is D: On a grounded panel near where feed lines enter the building. A lightning arrester should be installed on a grounded panel near where feed lines enter the building. This location provides protection by diverting lightning energy to ground before it can enter your station equipment. The arrester must be well-grounded and located at the entry point. For amateur radio operators, proper lightning protection is essential for equipment safety. Understanding arrester placement helps protect your investment from lightning damage.
考试技巧
Lightning arrester = at building entry on grounded panel. Think 'L'ightning 'A'rrester = 'L'ocation 'A't entry. Protects equipment by diverting lightning to ground before it enters. Not at transceiver, antenna, or power panel.
记忆口诀
Lightning arrester = at building entry on grounded panel. Think 'L'ightning 'A'rrester = 'L'ocation 'A't entry. Protects equipment by diverting lightning to ground. Must be well-grounded.
实际应用示例
Your feed line enters your house through a wall. You install a lightning arrester on a grounded panel right at that entry point. If lightning strikes your antenna, the arrester diverts the energy to ground before it can travel down the feed line and damage your transceiver and other equipment inside. The arrester must be well-grounded to work properly.
错误选项分析
Option A: Incorrect. Installing at the transceiver output doesn't protect the feed line or equipment - lightning can still enter through the feed line and damage equipment before reaching the transceiver. Option B: Incorrect. Installing at the antenna feed point doesn't protect equipment inside - the arrester needs to be at the building entry to protect interior equipment. Option C: Incorrect. Installing at the AC power panel doesn't protect RF feed lines - that's for power line protection, not antenna feed line protection.
知识点
Lightning arresters, Lightning protection, Feed line protection, Station safety
Verified Content
Question from official FCC Technician Class question pool. Explanation reviewed by licensed amateur radio operators.