A F12 XR5 stack at 21 and 15 meter. The latter is rotated with Pro.Sis.Tel ring Rotor.
A 11 element Force 12 10, 12, 15, 17 and 20 meters.
The ring rotor used to rotate the antenna at 15 m (not shown on the above pic).
Video showing the ring rotor in action.
Here is a frequency graph over 10-30 MHx with the antenna up 12 m height. Vertical doted markers are placed at the band edges.
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