Where should a lightning arrester be installed in a coaxial feed line?

A lightning arrester is designed to safely shunt high-voltage transients from a nearby lightning strike directly to ground before they can enter your home and damage your equipment. To be effective, it must be installed on a well-grounded panel located exactly at the point where the feed lines enter the building. This correctly diverts the massive electrical surge outside the house, keeping the energy away from indoor wiring, people, and flammable materials. Installing the arrester at the antenna feed point or at the transceiver output is dangerous and ineffective. Those locations either allow the surge to travel down the entire feedline first, or bring the surge completely inside the house before attempting to ground it.