I have a new installation of an Isotron 20 antenna. The Isotron 20 is a 20 meter antenna, clamped to the top of a 36' aluminum mast. The mast is supported with stand-off brackets to clear the guttering on the way up, and the bottom of the mast fits over a black steel pipe that is concreted in the ground in order to isolate the mast from lateral movement. The coax runs down from the antenna feed point about 20 feet, where a lightning arrester is placed within the feed line. The coax from the lightning arrester runs into the attic, and down a PVC chase that runs from the attic to the basement where the shack is located. With respect to any of these scenarios, it would be about 60 feet to the outside utility ground rod, whether going through the attic, or around the house with the ground wire buried in the soil. None of the scenarios would be a straight shot to the utility ground rod on the opposite side of the house for bonding purposes. All of the scenarios would probably present a few 90 degree bends to the ground wire before I would be able to tie into the utility ground rod on the other side of the house for bonding purposes. How would you ground the base of the mast? Scenario #1: The ground wire from the lightning arrester could be clamped to an 8’ ground rod at the base of the antenna mast, then a wire buried in soil from the ground rod at the base of the mast to the utility ground on the other side of the house. Scenario #2: Omit the ground rod at the base of the mast, but connect a wire directly to the base of the mast using a clamp, then bury a ground wire in soil that runs around the house to the utility ground rod on the other side of the house. Scenario #3: Ground the base of the mast directly to an 8’ ground rod at the base of the mast, and forget about trying to also bond to the utility service ground. Scenario #4: Omit the ground rod at the base of the mast, and route the ground wire into the attic from the lightning arrester, down through the PVC chase that the coax uses, then connect the ground wire directly to the utility ground wire that runs from the circuit breaker box in the basement directly to the utility ground rod outside using that same utility service wire from the circuit breaker box, resulting in a bonded connection of the mast to the utility ground rod on the outside of the house. Bringing the wire into the attic, and down the PVC chase would be easiest, since I could avoid having to bury a wire in the soil. Some might say, and they may be right, that bringing the ground wire from the mast into the house through the attic would be an unwise thing to do. But, it seems to me that as long as the ground wire I use is of a sufficient diameter, probably #2 or #3 wire, preferably insulated, then it should be no different than lightning striking the utility service where a lightning charge would enter the house through the inside circuit breaker boxes, versus bleeding off a lightning strike from the antenna mast. With a decent quality lightning arrester, chances are the charge from lightning wouldn’t enter the house anyway, hopefully. Other ideas are welcome as well...What say you?