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Yagi Antenna Building Parts
DX Engineering Yagi Antenna Hairpin Matching Systems
DX Engineering Yagi Antenna Hairpin Matching Systems are a convenient way to match the feed-point of a low-impedance Yagi design to 50 ohms. Then a 1:1 balun fed with 50-ohm coaxial cable may be used for optimal beam antenna performance and cancellation of RFI-causing common mode current. The DX Engineering Yagi Antenna Hairpin Matching Systems are balanced and easy to tune. They feature an upgraded electrical and mechanical design and are easily installed and tuned in as little as 10 minutes. They have enough capacity for almost any HF through 6 meter high performance Yagi design. Depending on your Yagi design, they include all of the hardware items that you need to match your Yagi antenna to a 50 ohm feed line -- without the need for drilling holes. If your Yagi does not have a split driven element (insulated from the boom), you will need to add the proper-size DX Engineering Insulated Boom-to-Element Bracket and DX Engineering Boom-to-Element Bracket Hardware Kit. Depending on the driven element diameter, you may also need DX Engineering Element Adapters. Different models cover most Yagi boom sizes and they are easily installed on the boom and fastened to the Yagi's split driven element with clamps. These same clamps may also be used for the balanced connections to the balun that handles the unbalanced coaxial cable. Hairpin Matching System Background: Many directly-fed Yagi antenna designs for HF and 50 MHz that are optimized for the best gain and front-to-back performance have feed-point impedances of approximately 20 to 25 Ohms, at resonance. Obviously, this will not allow a direct connection to a 50-ohm feedline without a serious mismatch (2:1 or more). There are various ways to match the driven element to the feed-line successfully; Gamma Match, T-Match, and the Hairpin (aka Beta Match) are favorites. The Gamma match is an outdated, unbalanced system that typically distorts the antenna radiation pattern. The T-match is basically two Gamma Match systems on either side of the boom, which may correct the imbalance, but is a mechanical nightmare and is difficult to tune correctly. In a superior-balanced Yagi feed system, the driven element must be insulated from the boom and it must be split at the boom so that the driven element halves are also insulated from each other, like a dipole. A balanced Yagi can make use of a balun for balanced distribution of RF currents and a proper, predictable radiation pattern. While the hairpin has been popular with radio operators for years, DX Engineering Yagi Antenna Hairpin Matching Systems improve on the classic design by using rods that are parallel to the boom. You can quickly match your Yagi antenna by repositioning the boom clamp and shorting bar along the boom and hairpin rods, so the antenna is easier to adjust for minimum SWR than conventional wire-loop hairpins. DX Engineering Yagi Antenna Hairpin Matching Systems also add rigidity, offer better protection against ice and wind, and add a professional appearance. Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. Improve your Yagi feed-point matching with DX Engineering Yagi Antenna Hairpin Matching Systems and accessories!
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$71.99
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$87.99
DX Engineering Flanged Feedpoint Connectors
DX Engineering Flanged Feedpoint Connectors provide a direct transition from coaxial cable to feedpoint for Yagi, Loop Fed Arrays (LFA), Rotatable Dipoles and other antennas that do not have a coaxial connector. The worry of failed weatherproofing at the end of a stripped coax is eliminated for the 50 ohm beam or loop antenna feedpoint with stud terminals. Flanged Feedpoint Connectors allow direct connection of a PL-259 or N male terminated coaxial cable. Only this Flanged version (FFPC) can be mounted using the optional bracket, Flanged Feedpoint Connector Mount (FFPM) and an optional studded band clamp or other clamp of choice. Two connector types are available in three versions: DXE-FFPC-SO239ZD UHF Female with 11 inch leads and color-coded heat shrink DXE-FFPC-SO239 UHF Female with 4 inch leads and color-coded heat shrink DXE-FFPC-N Type N with 4 inch leads and color-coded heat shrink Each Flanged Feedpoint Connector (FFPC) features silver-soldered solid tinned-copper 12 AWG wire leads to the silver-plated connector, which is epoxy potted into a plastic housing, 1.573 inch square and 0.787 inch deep, for a weather-sealed direct feedpoint connection. Each lead has color-coded heat shrink; Red is Center and Black is Shield. Additional weatherproofing should be applied to the male-female connector junction, as recommended. DX Engineering Flanged Feedpoint Connectors two wire leads are about 4 in. each, or 11 in. each for the ZD version. A longer length of wire can be soldered to these tinned wires, if required, but keep in mind that increasing connection spacing drives up feedpoint impedance, which could increase the possibility of mismatch on an antenna that has a 50 ohm feedpoint. Flanged Feedpoint Connectors are ideal for phased antenna pairs or multiples, on which a coaxial cable ferrite RF bead choke is desired at the feedpoint, in place of a traditional enclosure balun. The top performing 40-bead DXE-FBC Ferrite Bead Choke fits on 0.405 in. diameter coax cable, like RG-213U and RG-8U, prior to connector installation. For the 50 ohm beam or loop antenna feedpoint with stud terminals, the DXE-FFPC-SO239, DXE-FFPM and DXE-FBC are THE perfect combination of feedpoint connection, mounting and RF choke.
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$53.99
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$55.99
DX Engineering Antenna Element Tubing Kits
DX Engineering Antenna Element Tubing Kits includes enough raw aluminum tubing, uncut and not drilled, for one element regardless of type; driven, reflector or director. The antenna builder should select according to band, the number of kits that correspond to the number of elements in their particular directional antenna kit instructions. Included sections start at typical diameters and lengths for the indicated band and are sufficient for the entire single element. These are only raw aluminum tubing kits. All supplementary items, such as hardware, insulators and clamps, are sold separately.
Not Yet Reviewed
$62.99
DX Engineering Mast Top Mounting Plate
DX Engineering Mast Top Mounting Plate DXE-MTMP is a multi-purpose 16 x 5.1 inch (406.4 x 129.5mm) aluminum plate, 0.25 inch (6.35mm) thick, with a long edge flange bend 1.5 inch (38mm) deep for reinforcement. It is drilled for specific DX Engineering Stainless Steel V-Bolt Saddle Clamps and U-Bolt Saddle Clamps. A total of four clamps are required, which are sold separately for flexibility. This versatile, rugged plate and the optional clamps combine to add a strong extension mast above and in line with the original larger mast. This plate makes it easy to add a mast top antenna, electronic device or a strut tube for a boom support truss above a directional antenna. The DXE-MTMP mounts a smaller, short piece of tubing with a 1.000 to 1.500 inch (25.4 to 38.1mm) OD (outside diameter) above a larger mast or mounting tubing or pipe of either 1.00 to 2.00 inch (25.4 to 50.8mm) OR 2.375 to 3.000 inch (60.3 to 76.2mm) OD. This is the mounting plate now supplied with the DX Engineering XB-5 Hex Beam HF Antenna, DXE-XB-5-MMK. The DXE-MTMP can be used to remount an existing Hex Beam, and it is sold here separately for alternative clamp choices. As shown in the images, the DXE-MTMP reinforced plate has two pairs of upper holes with 6 in. (152.4mm) vertical spacing to use either of these DX Engineering Saddle Clamps: Two DXE-SSVC-150P for an upper steel mast mounting a range of 1.00 to 1.50 in. (25.4 to 38.1mm) OD, OR Two DXE-SAD-150A for aluminum or steel tubing that is exactly 1.500 in. (38.1mm) OD. Two lower pairs of holes also have 6 in. (152.4mm) vertical spacing. Use either of these V-Bolt Saddle Clamps: Two DXE-SSVC-2P for a 1.00 to 2.00 in. (25.4 to 50.8mm) OD steel mast, OR Two DXE-CAVS-2P for 1.00 to 2.00 in. (25.4 to 50.8mm) OD aluminum mast, OR Two DXE-SSVC-3P for a 2.375 to 3.000 in. (60.3 to 76.2mm) OD steel mast. Each mast requires about 8 in. (~200mm) of clamping length. Internal reinforcement of aluminum tubing or double wall thickness is encouraged. NOTICE: A total of FOUR DX Engineering Saddle Clamps are required, two for each steel or aluminum mast tubing or pipe. Other brand general hardware u-bolts will not fit this plate. Holes are drilled for the specified DX Engineering Saddle Clamps only. The user is responsible for appropriate and safe mechanical installation. No data is available for loading strength or suitability of use.
Not Yet Reviewed
$50.99
DX Engineering Feedpoint Connectors
DX Engineering Feedpoint Connectors provide a direct transition from coaxial cable to feedpoint for Yagi, Loop Fed Arrays (LFA), Rotatable Dipoles and other antennas that do not have a coaxial connector. Three Feedpoint Connector types are available; SO-239 UHF Female, Type-N Female and 7-16 DIN Female. Each Feedpoint Connector (FPC) features silver-soldered solid tinned-copper 12 AWG wire leads to the connector, which is epoxy potted into a plastic housing, 1.573 inch square and 0.787 inch deep, for a weather-sealed direct feedpoint connection. Of course, additional weatherproofing should be applied to the male to female connector junction, as is typically suggested. DX Engineering Feedpoint Connectors' two wire leads are about 4 in. each, for connection to balanced driven elements of beams and rotatable dipoles on which a coaxial connector does not exist. A longer length of wire is easily soldered to these tinned wires, if required, but increasing connection spacing drives up feedpoint impedance and increases the possibility of mismatch. FPCs are ideal for antennas, especially phased antenna pairs or multiples, on which a coaxial cable ferrite RF bead choke is required at the feedpoint, in place of a traditional enclosed balun. DXE-FPC units do not have mounting clamps, straps or holes. They are intended to be supported by the coax cable attachment to the boom or mast and by the connections to the antenna. An appropriate center insulator kit, such as the DXE-UWA-KIT and coaxial cable strain relief, DXE-CSR213-1, can accommodate the use of Feedpoint Connectors SO-239 UHF Female, Type-N and 7-16DIN for specialized and high power wire antennas, also accommodating a ferrite RF Bead Choke on the RG-213U size coax cable, 0.405 in. diameter.
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$86.99
DX Engineering Element to Boom Bracket Kits
DX Engineering Element to Boom Bracket Kits are used to build long-boom monoband directional antennas for the standard bands, 20 through 6 meters. These brackets kits mount aluminum antenna elements to a 3 inch boom for special beam antenna kits. Element to Boom Bracket Kits include a combination of one Boom Element Plate and specific sizes of DX Engineering Saddle Clamps. The part number indicates band and element type is indicated as D for driven element or P for parasitic element. The Boom Element Plates are made from a very strong 3/8 in. thick insulating material that has been predrilled for the included DX Engineering Saddle Clamps. DX Engineering Antenna Element Tubing Kits, Element to Boom Bracket Kits, Antenna Boom Tubing Kits are each sold separately.
Not Yet Reviewed
$74.96
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$98.95
DX Engineering Fiberglass Rod Insulators
DX Engineering Fiberglass Rod Insulators are used as the center insulator in the driven elements of long-boom monoband directional antennas for the standard bands, 20 through 6 meters. They are each predrilled for specific element tubing, selected according to outside diameter (OD), depending upon band. DX Engineering Antenna Element Tubing Kits, Element to Boom Bracket Kits, Antenna Boom Tubing Kits are each sold separately.
Not Yet Reviewed
$79.99
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$82.99
Clearance
DX Engineering Boom Element Plates
DX Engineering Boom Element Plates are used to build long-boom monoband directional antennas for the standard bands, 20 through 6 meters. They are made from a very strong 3/8 in. thick insulating material, each predrilled for specific DX Engineering saddle clamps and sized dependent upon band and element type, driven or parasitic. They accommodate the mounting of aluminum antenna elements to a 3-inch boom for special beam antenna kits. This series of insulated plates have no hardware; they are component parts used in the DXE-EBB Element to Boom Bracket Kits which include one plate and the appropriate sizes and number of saddle clamps, depending upon band and element type. DX Engineering Antenna Element Tubing Kits, Element to Boom Bracket Kits, and Antenna Boom Tubing Kits are each sold separately.
Not Yet Reviewed
$79.99
$63.99