I am old school and build my own antennas. My favorite bands are 40 and 75, I am getting ready to build a very long vertical which will be a full 1/4 wave on 40. It will have a very large home made coil in the center for use on 75, optimized for the highest Q possible. It is made of .250 copper tubing and is 5" inner diameter and about 5" long. When using 75 it will also have a large capacity hat to reduce needed inductance in the coil. The base will be 2" aluminum tubing from old 2 meter beams, about 15 feet long. The part above the coil is an old CB 5/8 vertical, telescoping aluminum, around 17 feet long. The mount will be on the pinbox of my 36' fifth wheel. There is no metal in the body or roof of the trailer. It is going to be VERY narrow banded with the high Q, but highly efficient (for an RV).
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