This antenna is resonate at 5� ohms, and requires no tuner on most bands. On 1� meters it is good in the SSB portion of the band, but will not work above 28.9 without a tuner.
The dipole is mounted at about 35 feet off the ground. It is suspended with nylon twine, between a mast mounted on my roof, and a back yard corner tree, some 4� feet away. I used small pulleys at the tree, and on the mast, so I could lower the antenna if needed.
The antenna was mounted and tuned at a lower level, and then raised to it's present position. Raising it changed the setting only slightly.
To separate and evenly spread the antenna elements, I cut up a couple of 1� foot pieces of PCV refrigerator water line, and drilled them for the wire elements to pass through.
The separators are held in place with short pieces of #14 un-insulated electrical wire wrapped around the antenna wire and separator.
I don't recommend supporting the ends with wire and insulators. If possible use nylon twine or rope, and if possible, keep the antenna ends away from metal objects.
A small amount of the 6, 1� and 12 meter elements extends past the spreaders for alignment purposes. Alignment of the 17 meter antenna involves re-wrapping the wire ends on the insulators, if you cut it too short, you can wrap and solder some short pieces off the ends at a point before the wire wraps around the insulator.
I recommend painting the spreaders flat black to help protect them from sunlight, and help hide the antenna. I spaced the spreaders out about every 18 inches. I spaced the elements 2 inches apart on the spreaders. You can space the elements anything over 1 inch, but they must be uniform.
Element lengths are measured from the center insulator support eyelet to the end. I started with these lengths, and checked VSWR, and tuned each element in the following order: 17 meters= 13 feet, 12 meters= 9 feet 6-1/2 inches, 1Ø meters= 8 feet 5-1/2 inches, and 6 meters= 58 inches.
To tune each element to my favorite frequency, I then clipped each dipole at both ends, 1/4 to 1/2 inch at a time, checking VSWR every time. Then, re-check all elements in order, and re-tune if necessary.