84 Insulated Boom-to-Element Brackets DX Engineering of ers insulated boom-to-element brackets to fit 1.75 inch, 2 inch and 3 inch OD booms. The non-metallic brackets electrically insulate the elements from the boom, which virtually nullifies the shortening ef ect that the boom and the normal metallic boom-to-element plates have on element length. This means the element lengths calculated through antenna design programs like YO, EZNEC and others will correspond more closely to the actual lengths needed. In most cases, the cost of the boom-to-element brackets is less than using a metallic plate and the necessary saddle clamps. DXE-BEB-1 with Gorilla Grip® Boom Clamps The DXE-BEB-1 replaces KLM or equivalent boom- to-element brackets. The bracket is also handy for any application where you need to insulate antenna elements. This patented DX Engineering bracket is made from a much stronger material and features a pair of weather-resistant Gorilla Grip stainless steel clamps. It is five times stronger than the original KLM bracket and lets you use up to 1.25 inch OD element tubing. Gorilla Grip® stainless steel boom clamps ensure your antenna elements won’t twist or deform in stif wind. Use the DXE-ELA-1-2 Element Adapters to use a 1 inch diameter element with the DXE-BEB-1. DX Engineering of ers two hardware kits for the BEB-1. The standard kit is a direct KLM hardware replacement with #10 element fasteners. It includes a pair of Gorilla Grip® stainless steel boom clamps, stainless steel bolts, nuts and washers to attach clamps to the DXE-BEB-1, and stainless steel bolts, nuts and washers to attach elements or adapters to the element brackets. The vibration-resistant nuts have nylon inserts. The HWK-2 heavy-duty kit uses 1/4 inch bolts and hardware, so it is considered an upgrade for KLM brackets. DXE-BEB-1 Insulated Boom-to-Element Bracket, 3" Boom ...................$39.99 DXE-BEB-1HWK KLM Direct Replacement Hardware Kit ................................$29.99 DXE-BEB-1HWK-2 Hardware Kit with 1/4" Bolts ................................................$35.99 DXE-ELA-1-2 Element Adapters, 1.25" to 1", for DXE-BEB-1 .....................$46.99 These brackets are made for 3 inch OD booms only. For 2 inch booms, please use DXE-BEB-2. DXE-BEB-2 with Gorilla Grip® Boom Clamp The DXE-BEB-2 is made from an extremely strong, UV-resistant polymer. When bolted to your 2 inch boom using our hardware kit and the included Gorilla Grip boom clamp, it will easily support a split 20M element without a fiberglass centerpiece. It is a budget friendly way to insulate the elements when you’re building your next Yagi, LPDA or any boom antenna with a 2" OD boom. The BEB-2 accepts up to a 7/8 inch element, which is perfect for most 20-6M antennas. Building a large antenna? Use our DXE-BEB-1 Boom-to-Element Bracket. The DXE-BEB-2 comes in 2 pieces and bolts together with a DXE-BEB-2HWK Stainless Steel Hardware Clamp Kit that also holds it securely to the boom. The hardware kit includes four stainless steel bolts, washers and lock nuts for assembling the bracket. A Gorilla Grip® stainless steel boom clamp is included to attach the element to the bracket. The vibration-resistant nuts have nylon inserts. The DXE-BEB-2HWK Hardware Kit for the DXE-BEB-2 Bracket is sold separately. Larger antennas that experience high winds will require the boom clamp to be pinned to the boom. DXE-BEB-2 Insulated Boom-to-Element Bracket, 2" Boom ...................$31.99 DXE-BEB-2HWK Hardware Kit for DXE-BEB-2 .................................................$22.99 DXE-BEB-3 Great for 6 meter Yagis, the DXE-BEB-3 Insulated Boom-to-Element Bracket is a handy, budget-conscious way to mount elements to smaller (1.25 inch to 1.75 inch) booms. The bracket accepts elements up to 3/4 inches. Use the DXE-SEI-1 Split Element Insulator for 3/4 inch OD aluminum tube for the driven element. The insulator allows the element to be securely clamped without crushing the tube. DXE-BEB-3 Insulated Boom-to-Element Bracket, 1.25", 1.50" or 1.75" Boom ......................................................$7.99 DXE-SEI-1 Split Element Insulator .........................................................$27.99 DXE-BEB-3 DXE-BEB-1 DXE-BEB-2 DXE-SEI-1 KX4O Vertical Dipole Antenna Support Plate When John Huggins, KX4O designed his revolutionary AHVD Vertical Dipole, he probably didn’t imagine that it would become so popular. The unusual “upside-down T” design delivers such impressive 20-10M coverage, that it’s no surprise operators started building them. Let this plate be the foundation of your build. The weather-resistant 0.25" thick polymer plate measures 11.5" x 7.5" and is pre-drilled for easy assembly. DXE-MMP-KX4O KX4O Vertical Dipole Support Plate .....................................$27.99 Hairpin-Style Driven Element Matching Kits Most Yagi antennas have a feedpoint impedance of about 25 Ω. Obviously, this will not allow a connection to a 50 Ω feedline without a serious mismatch. There are various ways to match the driven element to the feedline successfully. Gamma, T-Match and the Hairpin (aka Beta Match) are favorites. The Gamma match is an unbalanced system that typically distorts the antenna pattern. The T-Match is basically two Gamma match systems on either side of the boom, which corrects the imbalance but is a mechanical nightmare and dif icult to tune correctly. The DX Engineering Hairpin is balanced and easy to tune. It has the correct electrical and mechanical design to allow it to be easily installed and tuned in 10 minutes, and has enough capacity for almost any Yagi design. Complete your installation with elements, element brackets and bracket hardware, available separately. For use with BEB-2 Insulated Boom-to-Element Brackets DXE-HMS-1P Hairpin Matching Syst., 10-30 MHz, Fits 2" Boom ...............$71.99 For use with BEB-3 Insulated Boom-to-Element Brackets and an SEI Split Element Insert DXE-HMS-2P Hairpin Matching Syst., 24.9-54 MHz, Fits 1-1.75" Boom ....$87.99 For use with BEB-1 Insulated Boom-to-Element Brackets DXE-HMS-4P Hairpin Matching Syst., 10-30 MHz, Fits 3" Boom ...............$71.99 DXE-HMS-1P Element, element bracket and bracket hardware sold separately. Genius Clamps If you’ve ever struggled to mount a horizontal cross bar to a piece of vertical tubing, then you’d probably call these “Genius!” Clamps, too. They’re the ideal way to create a tower standof to side-mount an extra antenna. These stainless steel clamps are sized for 1" to 2" OD pipe, in both horizontal and vertical orientation. Two versions are available, one for a parallel standof , and another to create a right angle mount that’s perfect for installing a vertical mast. Genius Clamp hardware is sold separately. DXE-SSGC-2P Genius Clamps, Right Angle, Pair ........................................$77.99 DXE-SSGC-2VP Genius Clamps, Parallel, Pair ...............................................$92.99 Stainless Steel Genius Clamp hardware DXE-SSGCBOLT-6-5 6.5" Bolt Length, 5/16"-18 Thread, Set of 8 ........................$22.49 DXE-SSGCBOLT-6 6" Bolt Length, 5/16"-18 Thread, Set of 8 ...........................$19.99 DXE-SSGCBOLT-5-5 5.5" Bolt Length, 5/16"-18 Thread, Set of 8 ........................$19.49 DXE-SSGCBOLT-4-5 4.5" Bolt Length, 5/16"-18 Thread, Set of 8 ........................$17.99 DXE-SSGCBOLT-5 5" Bolt Length, 5/16"-18 Thread, Set of 8 ...........................$18.29 DXE-SSGCBOLT-4 4" Bolt Length, 5/16"-18 Thread, Set of 8 ...........................$13.99 Boom Support Parts As antennas become larger, booms become longer, or the wind speed becomes higher, our 3 inch Boom Support Systems will keep the boom straight. Your antenna will look better, perform better and survive storms in better shape. Many of the individual pieces in these systems are available separately so you can design and build your own support systems. 2 Inch Boom Support Components DXE-ATBB-2 2" Boom Bracket ................ $11.99 3 Inch Dual Boom Support System and Components DXE-ATBB-3 3" Boom Bracket ................ $12.99 Turnbuckles DXE-TRBK-14 Turnbuckle, 5.25" Retracted, 7.375" Extended ......................$8.49 DXE-TRBK-15 Turnbuckle, 6.5" Retracted, 9.125" Extended ......................$10.49 DXE-TRBK-14 DXE-ATBB-2 Antennas: Hardware Orders over $99 qualify for FREE standard shipping—see pg. 74 for details.
