by cables running from the tuning unit to the guys or crossbars at a certain height.

Directional aerials consist of multiple masts, which need not to be of the same height. It is also possible to realize directional aerials for mediumwave with cage aerials where some parts of the cage are fed with a certain phase difference.

For medium-wave (AM) broadcasting, quarter-wave masts are between 153 ft and 463 ft high, depending on the frequency. Because such tall masts can be costly and uneconomic,

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