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Hi kint98 and all,
Just a couple of comments about grounding antennas for lightning protection.
Local electrical codes require grounding of masts and grounded protection of lead wires (such as spark gaps or gas discharge tubes) at the point of entry of a building because this provides a path to ground in the event of a direct or nearby strike. The idea here is to protect the building and its contents, and NOT the mast or antenna. I wanted to make that distinction about the purpose of protective grounding.
A second advantage of grounding is that due to wind and other natural effects, a static charge can develop on an antenna which can cause noise in radio reception and damage to transmitters. A DC connection to earth ground such as through an inductor will drain the charge from the antenna.