21.5 feet Standard Duty Fiberglass Push-up Mast MK-4-STD
The MK-4 Series of masts (including the MK-4-STD masts) are, by far, our most portable masts for many reasons. The masts are light weight and short enough, when fully collapsed, to manipulate the quik-clamps from the ground. This mast will get you above most obstacles to achieve maximum height, line-of-sight, maximum gain, and the best reception. Our masts are completely adjustable along the entire length of each tube. The MK-4 Series of masts are perfect for most portable applications.
See the photo gallery to see dozens of pictures, all taken by customers, of our mast systems being used for a number of different applications.
- Maximum Usable Length (Height): 21.5 feet
- Length when sleeved: 5 feet and 1 inches
- Minimum overlap of tubes: 4.25 inches
- Length of Tubes: 46.5 inches
- Outer Diameter of Bottom Section: 2 inch
- Outer Diameter of Top Section: 3/4 inch
- Total Number of Sections: 6
- Weight (when assembled): 7.9 pounds
Accessorize your mast for the greatest effectiveness
A tall structure such as our full-length model MK-8 or MK-6 series masts (including the HD versions) MUST be guyed and kept under control with guys even while being erected. NOTE: Do NOT use metal guy cables with this mast system! Metal cables are conductive and HEAVY and add significantly to the vertical loading of the mast. Enlist three friends, family, or neighbors (or 4, if you choose 4 point guying) to stand in the approximate locations of the guy anchor points, and to hold the guy ropes and “feed them out” as you extend the mast, all the while being certain that the mast stays vertical. We recommend guying at least two levels with three direction guys. The kit below comes with everything we offer to guy your mast effectively.
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About Max-Gain Systems, Inc.
Max-Gain Systems, Inc. carries a full line of in-series, between series, right angle, T-shaped, quick connect, handie-talkie (BLACK), pigtails (coaxial jumpers), etc… RF adapters. Our RF adapter lines are constantly expanding. We keep our RF connector and adapter lines in stock. We ship both retail and wholesale quantities. To become a dealer / wholesale user, contact us with your potential usage.
Max-Gain Systems, Inc. is the number one supplier of fiberglass round hollow tube, square tube and round solid rod to the antenna manufacturing industry. We produce millions of feet a year for hundreds of different industries including but not limited to: marine / boating, aeronautical, agriculture, construction, emergency services, etc…. We have the unique ability to sell one piece or even a semi-truck full. Feel free to prototype using our fiberglass tube and rod then contact us for a quote on a production run. At production run quantities we can cut to your desired lengths at no additional charge, and we can also perform several different fabrications (example: drilling holes in precise locations along a tube) to ensure your delivered material is ready for assembly. We have several accessory items designed for our fiberglass including but not limited to: couplers, telescoping clamps, ferrules, etc…