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[quote:28b998dbdd=”YvesRoy”]If you follow the Part 15 Rules option B which it says:
“The total length of the transmission line, antenna and ground lead (if used) shall not exceed 3 meters.” It means that you can’t install radials more than 3 meters long. You can, however, install radials as many as you want.[/quote:28b998dbdd]
Probably the FCC and its Canadian counterpart would not view a [u:28b998dbdd]buried[/u:28b998dbdd] radial ground system, or any other [u:28b998dbdd]buried[/u:28b998dbdd] ground conductors as part of the radiating portion of the antenna subject to the 3-meter limit.
Buried radials do not themselves radiate in any way to improve groundwave field strength. They only provide a low resistance path to Earth potential that is used as a reference ground for the 3-meter-long radiator system defined by the Rules.
This low-resistance path to true Earth potential reduces antenna system losses, and THAT is why distant field strength improves when using a good radial ground system.