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Mastrant Antenna Support and Guy Line Ropes
Mastrant Antenna Support and Guy Line Ropes are available in several sizes and strength ratings, perfect for support of wire antennas, vertical antennas and antenna masts, as well as support of Yagi booms and elements. Mastrant ropes are of the highest quality for strength and are UV-protected for extended longevity. MASTRANT-O is a highly reflective rope (bright orange plus braided reflective tape) based on long-term proven Polyester (Dacron) product line. It is designed for maximum visibility in public places such as Field Day and POTA activities. Like all Mastrant ropes, it is UV stable and resistant to all weather conditions. It has low weight, great abrasion resistance, great durability and is nonconductive (no effect whatsoever on your antenna). Moreover, in contrast to ropes made from aramid fibers (Kevlar, Vectran, Technora, Twaron), it has knot strength about 60 %. Mastrant-P and Mastrant-R Ropes are stronger than other synthetic ropes of the same size, made from proven modern polyester. Mastrant-Q is a new rope made from a blend of polyester and polypropylene, designed specifically for guying applications. It offers an excellent performance-to-price ratio and has a knot strength of approximately 60%. It replaces Mastrant-P in diameters of 6 mm (1/4 in.) and larger. Mastrant-S is a similar polyester/polypropylene rope, distinguished by its highly reflective strands for increased visibility. Mastrant-M is their highest strength rope with the Dyneema® DM20 core, a superior synthetic rope offering high performance at an affordable price. Very high strength, negligible elongation, very low weight, and great abrasion resistance are all attributes that make Mastrant-M the best rope for guying. Larger, stronger sizes of Mastrant-M are used in Europe and other parts of the world for tower guying. Durability and safety are of prime concern to ensure that an antenna installation remains fully operational for a long time. Antennas and guy lines are exposed to changing weather conditions, mechanical strain, UV radiation, humidity, and more. These non-conductive synthetic fibers have all the necessary qualities: high strength, negligible stretch but good flexibility, long life, low moisture collection, fast drying, a minimum bending radius adding the ability to tie knots, good UV radiation resistance, weather durability and resistance to acids and alkali. Conversely, steel guying wires are heavy, difficult to work with, and their strength deteriorates with time due to corrosion and general aging. Electrical conductivity of steel guys is an undesirable feature, as they interact with the antennas and adversely modify radiation patterns. Thanks to recent developments in synthetic materials, both amateur and professional users are changing over to non-conductive guys and ropes. Mastrant offers these products for a variety of applications, from thin support lines used for wire antennas and beams, to rope guys for supporting small and portable masts and vertical antennas. When you need quality rope to install, replace, or modify your antenna systems, consider Mastrant Antenna Support and Guy Line Ropes, now available from DX Engineering.
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$109.99
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$244.99
Synthetic Textile Industries Antenna Support Rope
Synthetic Textile Industries Antenna Support Rope is the premium double-braided Dacron/polyester rope that Amateurs and SWLs have been using for years! Available in several sizes and spool lengths, these superior antenna support ropes are not weakened by decay or mildew and provide excellent resistance to abrasion. The color sealed black polyester yarn used in the braided jacket also protects the cord from damage due to ultra-violet light. Order some Antenna Support Rope today, so you will have it on hand for your next antenna project! This rope is perfect for supporting your wire and vertical antennas, but support rope should NOT be used for tower guying. For your tower guying needs, check out our Tower Guy Lines in the Tower Department here at www.DXEngineering.com
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$116.99
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$149.99
EAntenna Sloper Antennas
The EAntenna Slopers are shortened with a coil to reduce the antenna length, but behave like quarter-wave sloper antennas. Like any Sloper antenna, it is directional with a low angle for excellent long range DX results. Directivity is away from the supporting metal mast or tower, toward the lower end of the sloper. If a non-metallic vertical support is used for the sloper, an additional vertical wire counterpoise is required. The antenna wire is 2mm (approx. 12 AWG) with UV-resistant insulation for durability. This antenna does not include a balun, but use with a feedline choke, line isolator, or coax bead choke is recommended to achieve the desired results. These antennas are rated for 2 kW CW. The EAntenna EASLP160S achieves a considerable 2:1 SWR bandwidth of 75 kHz. The EAntenna EASLP80S achieves a respectable 2:1 SWR bandwidth of 210 kHz. The assembly and deployment of this antenna is simple. The feedpoint of the antenna is attached to the mast or tower at the minimum height listed below, or higher, if possible, for better results. If supported by a tree, this antenna requires a grounded vertical wire counterpoise, in addition to the coax feedline. With antenna support rope, extend the insulated end to a support a minimum of 10 ft. above the ground. This antenna is preset to the bottom of the band. Adjust to higher frequencies within the band with 5 cm (2 in.) cuts for gradual changes while using an antenna analyzer. In just 5 minutes you can prune the antenna to cover the desired portion of the band. Physical Characteristics of the EAntenna Slopers: * EASLP160 Total Length: 17.7m (58.0 ft.); Minimum Height: 12.7m (41.6 ft.) * EASLP80 Total Length: 11.0m (36.0 ft.); Minimum Height: 8.0m (26.2 ft.)
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$122.99
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$161.99
DX Engineering Multi-Band Dipole Antennas
DX Engineering Multi-Band Dipole Antennas are designs that are rugged, yet lightweight. Using a tuner, they are usable to 30 MHz and come complete with the wire elements, ladder feedline, center T support, and end mount brackets. These antennas are built using the highest quality components. They use 14 AWG stranded-copper, PVC jacketed elements for flexibility and strength and 100 ft. of 18 AWG 300-ohm 0.88 Velocity Factor ladder lines that are UV-resistant. Stainless steel hardware is included. Often, a 4:1 balun is suggested for multi-band dipoles; however, the best balun to use for this application is a 1:1 ratio. The 1:1 baluns provide better balance, have lower loss, and are more tolerant to load impedance and balance variations than other baluns. A tuner balun is not included in the dipole antenna kits and is available separately. The dipole center T support has pre-drilled holes for the attachment of the wire elements, feedline, and support or messenger lines. The center support top hole is used for the attachment of a "messenger line" that can be strung above the antenna wire and is used to provide support for the antenna wire and feedline. The use of the messenger line, which is strongly recommended but not included, will reduce the stress on the element wires and keep the antenna from stretching over time, which will change its resonant frequency. This line can be thin Synthetic Textile rope available from DX Engineering, which has a high breaking strength. Ideally, it should attach to the same structure used for the dipole, only above it, forming at least a 30 degree angle between the dipole and the messenger line. For further information and to decide the amount of rope you will need, please read the included instructions and check your wire antenna area of construction. Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. When you lack the room for more than one antenna or need a multiband antenna for band agility, consider one of these DX Engineering Multi-Band Dipole Antennas as an elegant and economical solution!
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$125.99
Alpha Delta Parallel SWL Dipole Antennas
Alpha Delta Parallel SWL Dipole Antennas cover AM broadcast through 30 MHz. They provide efficient, low-noise, broadband performance for medium wave, tropical, international SW, military, government, embassy, maritime, aircraft, commercial, and utility frequencies. They feature ISO-RES inductors, parallel wire elements, and the exclusive DELTA-C center insulator with the built-in ARC-PLUG static electricity protector. The antennas utilize stainless steel hardware and 12-gauge solid copper wires. Their overall length is 80 ft. and they may be installed as dipole, inverted-vee, or full sloper antennas. These antennas can also be used with an antenna tuner as transmit antennas. Their connectors will accept either coaxial cable or balanced line and the antennas come fully assembled and ready for installation.
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$209.99
Par EndFedz® Antennas
Par EndFedz® Antennas are End Fed Half Wave (EFHW) antennas with the match box coax connection at the end of the wire, for convenient and quick stealth portable operations. These single-band and multi-band antennas can be mounted horizontally, vertically, or as a sloper. No ground plane or counterpoise is needed so portable operation could not be easier. Simply hang the far end from a tree limb or send the wire out a hotel room window or balcony. You can use a telescoping fiberglass mast to get the antenna really high in the air and the supplied end insulators the installation easy. Stealth operation in CC&R and HOA antenna restricted locations is simplified. Their all-black construction makes them difficult to see. Each Par EndFedz® features a UV-resistant black ABS plastic housing with a support rope attachment hole that encloses a matching network to allow the antenna to be fed with standard 50 ohm coaxial cable with a PL-259 (UHF male). All hardware is stainless steel and the SO-239 (UHF female) connector is silver plated and has a PTFE dielectric. The antenna wires are either 18 or 26 AWG stranded Copperweld® with 200 pound breaking strength and a tough, 100% UV stable black polyethylene jacket. One end of the antenna wire has a #10 solder lug making attachment to the matching network feedpoint simple and easily replaceable, if necessary. Standard single and multi-band versions handle 100 or 200 watts and higher power versions handle 300 watts. Lightweight QRP PolyStealth models handle 25 watts and are ideal for portable operation because they are lightweight; the MKII model weighs only 8 ounces and the Trail Friendly model weighs only 3.5 oz. Par EndFedz® Antennas require no counterpoise or extra conductors. The EF-ALLBAND-KW model, about 133 ft. in length, covers eight bands, 80 through 10 meters. The ALLBANDKWJR is 74 ft. in length and operates on five bands, 80-10 meters. The 64 ft. EF-40-10-KW operates on four bands. All three models handle up to 1000 watts SSB/CW and 250 watts AM/Digital Modes. The need for an external tuner may vary based on the antenna model selected and the desired operating band. The manufacturer refers to these antennas as "End-Fed Dipoles" based upon the assertion that a "half-wave radiator is a dipole." This is a variant of the classic definition of a dipole which is a center-fed antenna with two radiating legs running in opposite directions from the feed point. Additional claims about the EFHW state that end feeding a half-wave "can energize the radiator 'nearly' as well as a center-fed." Recent anecdotal measurements indicate that the EFHW radiates about 70% as well as a traditional center-fed dipole. More information is available at each Par EndFedz® model listed below. Order yours from DX Engineering.
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$189.95