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Could be the thickness of the insulating material (delrin). It creates a capacitor between the hot side and the rf ground side of the antenna. I've had maco 5/8's and have wondered myself. I did removed the original wire from the tuning ring and replaced it with 8 Guage. I don't know if that was the cause of it being so broadband, but I could operate on the low end of 10 meters with no problem.

[QUOTE="Tony Williams, post: 811039, member: 64680"] Could be the thickness of the insulating material (delrin). It creates a capacitor between the hot side and the rf ground side of the antenna. I've had maco 5/8's and have wondered myself. I did removed the original wire from the tuning ring and replaced it with 8 Guage. I don't know if that was the cause of it being so broadband, but I could operate on the low end of 10 meters with no problem. [/QUOTE]

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