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Chameleon Knowledge Base · The Complete Online HF Antenna Handbook

What Is a Lightning Arrestor?

A coaxial lightning arrestor is a surge-protective device that diverts part of a transient from the signal conductor toward a bonded grounding path; it is one component of a complete entry system.

Grounding, Bonding & Lightning Protection Lightning Protection Reviewed 2026-07-14
Start with the function: A coaxial lightning arrestor is a surge-protective device that diverts part of a transient from the signal conductor toward a bonded grounding path; it is one component of a complete entry system.

What the label leaves out

Its response, voltage rating, frequency, power, connector, gas tube or other element, enclosure, mounting, and bond impedance determine performance.

The mistake to avoid

Screwing an arrestor inline without mounting it to a properly bonded entry plate provides no controlled low-impedance diversion path.

A sound installation approach

Choose a listed device for the feed system, install at the entry, bond it with the prescribed short path, weatherproof connections, inspect or replace elements as required, and still disconnect before storms.

System boundary

Use current manufacturer documentation, measured RF behavior, the building grounding system, and applicable electrical and lightning requirements. A ratio, DC continuity check, or inline protective device does not establish complete-system safety or efficiency.

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