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MAX-GAIN SYSTEMS, INC. announces an expansion of its extensive line of fiberglass rods and tubes to include all-fiberglass quad spreaders-up to 26 feet in length!
Many spreader types are available:
With these additions to our line, our customers have a wide range of choices, allowing them to customize their choice of spreaders for the load the spreaders will be asked to carry: lowest band desired, total number of bands, and the most severe weather conditions likely to be encountered in their location. You may design your quad with budget in mind, or to be "bulletproof". In either case, our aim is to give you absolutely the most for your money.
Buying spreaders to repair a damaged Lightning Bolt quad? Take a look at this VERY well done page by WB9DLC:
PLEASE NOTE: If you have not done so already, be certain to visit this additional page on our site, which contains even more useful information of interest to quad builders: http://www.mgs4u.com/fiberglass-tips.htm
Wire Attachment Method for Quads - Does Not Require Drilling Spreaders
The following photos illustrate an easy method of making almost indestructible clamps to be used to attach element wires on quad antenna spreaders. This method does not require drilling through the spreaders. (Drilling holes through the spreaders would of course weaken the fiberglass at each drilled location.) This method allows easy and infinite adjustment of the corners of the wire loops, for easy and precise loop centering on the element spreaders. This method cushions and protects the wire elements at the points of greatest stress . the loop corners, and prevents sharp bends which weaken the wire.
These clamps consist of an ALL STAINLESS hose screw-clamp.. (be certain the screw clamp says "All Stainless" or the screw itself will be plated, not stainless, and it will eventually rust), a short length of copper plumbing pipe, and a plastic tube. Very simple, but effective. For the plastic tube, it is best to use a very tough and UV resistant material such as truck air-brake hose (from auto parts store) instead of clear vinyl tube. It will last MUCH longer. Also, spray-paint the plastic tube with flat-black spray paint for additional UV protection.
The photos below may be clicked to enlarge:
In order to estimate how far out (measured from the center of the boom) a quad wire of a given length will intersect with a spreader, use this formula:
A far less complex method (with thanks to Ed Niemi, K6EDJ) is to simply take the cosine of one side of the quad loop (.707 times the length of one side of the quad loop) and measure out the sp reader (measure from the center of the boom) to determine the point of wire attachment! The measurement from corner to corner, measuring down one sp reader, through the boom, and up the opposite sp reader, (wire attachment point to wire attachment point) of each quad loop will be 1.414 times the length of one side of the quad loop.
FOR MORE USEFUL TIPS, VISIT THIS PAGE: http://www.mgs4u.com/fiberglass-tips.htm
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