97 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 ........................$23.99 DXE-SSGCBOLT-6 6" Bolt Length, 5/16"-18 Thread, Set of 8 ...........................$20.99 DXE-SSGCBOLT-5-5 5.5" Bolt Length, 5/16"-18 Thread, Set of 8 ........................$19.99 DXE-SSGCBOLT-4-5 4.5" Bolt Length, 5/16"-18 Thread, Set of 8 ........................$18.79 DXE-SSGCBOLT-5 5" Bolt Length, 5/16"-18 Thread, Set of 8 ...........................$18.49 DXE-SSGCBOLT-4 4" Bolt Length, 5/16"-18 Thread, Set of 8 ...........................$14.99 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 ................ $14.99 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 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-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 ....................................................$15.99 DXE-SEI-1 Split Element Insulator .........................................................$27.99 DXE-BEB-3 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 Antenna Building DXE-1023-2 DXE-CGB-150 Two DXE-UHF-FDFB shown mounted to a DXE-CGB-150 using the hardware kit DXE-FSM-HWK Coaxial Cable Grounding Brackets The CGB-Series Coax Grounding Brackets are designed for grounding coaxial cable shields. The stainless steel bracket is supplied with a stainless steelV-bolt and hardware in your choice of two sizes for a solid connection to a tower leg or mast. Each bracket has holes for bulkhead connectors or chassis mount connectors, listed below. The Grounding Bracket is an ideal junction point for the coax pigtails that form the rotor loop to connect to the downleads. The bracket can also be used at the base of the tower to provide a solid grounding point before the coax cable is routed away from the grounded tower. The bracket has serrated teeth to bite through paint and corrosion. DXE-CGB-200 Grounding Bracket, Fits 1" to 2" OD Tube .................$22.99 DXE-CGB-150 Grounding Bracket, Fits 1" to 1.50" OD Tube ...........$21.99 DXE-363-SST SO-239, Bulkhead Connector with Socket Hardware ..............$11.99 DXE-UHF-FDFB-KIT Bulkhead Connector and Hardware Kit ......................$17.98 DXE-1023-2 Type N Double Female Bulkhead Adapter, Pack of 2 ....$34.99 DXE-UHF-FDFB-KIT Join our crew on Facebook for news and exclusive deals!
