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3 Results Found For "in-line"
DX Engineering 450 Ohm Ladder Line
DX Engineering 450 Ohm Ladder Line is a transmitting grade low-loss parallel-wire RF feedline featuring a strong, waterproof, UV black polyethylene insulation. To maintain the wire spacing between the conductors while reducing losses, the integral flat plastic material alternates with rectangular openings, which explains the "Window Line" nickname. Capable of handling over 3 kW of RF power, DXE-LL450 is a very low-loss transmission line across HF. It is ideal for exceptionally long feedline runs and for low band wire antennas operated on multiple bands on which the feedpoint impedance can vary significantly, causing mismatch and elevated SWR. Unlike coaxial cables, DX Engineering DXE-LL450 Ladder Line maintains low RF losses at frequencies where antenna feedpoint impedance mismatches cause high SWR. It can provide significantly higher efficiency than coaxial cable when feeding non-resonant antenna systems that are matched with a wide impedance range antenna tuner. DXE-LL450 450 Ohm Ladder Line is a high-quality flat RF feedline, about 0.938 in. wide (15/16") with two 16-gauge copper-clad steel wire conductors (29 AWG x 19 strands) that provide the strength to hold up for long spans between supports without twisting. It exhibits a nominal impedance of around 400 Ohms and a nominal Velocity Factor of 91 percent. For proper performance, LL450 Ladder Line must be installed suspended through the air supported by insulators every 25 ft. or less, kept at right angles and several inches away from other wires, and at least one foot away when run parallel to the earth or large metal surfaces. Installing with an axial twist of one turn per 10 ft. can reduce wind, rain and ice loading, RF coupling and RF noise. DXE-LL450 can be mounted with insulators and suspended on metal or wood posts or run along a wood fence line, only if the fence has no wires or metal mesh that couples RF noise or unbalances the feedline. Often used for non-resonant wire doublet antennas, DXE-LL450 can be more easily terminated outdoors to a DXE-MC20-C4-1 4:1 Balun or a DXE-MC20-1-1T 1:1 Balun. Then, with no inline switches or relays, directly connect the antenna system to a typical indoor wide range antenna tuner using a solid dielectric coax, not foam dielectric, to handle high voltage at high SWR. DXE-213U or DXE-214 Coaxial Cable Assemblies 12 or 18 ft. with PL-259s are perfect for this method, which eliminates the need for a special balanced tuner, and avoids the losses and detuning effects caused by unbalancing when ladder line is routed indoors near wires and ducts. DXE-LL450 is sold by the foot, previously sold as DXE-LL450-CTL, this is the same ladder line with a new part number. It is also available in spools of 500 ft. DXE-LL450-5C and 1,000 ft. DXE-LL450-1K, which are specified for DX Engineering Reversible Beverage System Antennas. NOTE: This type of feedline is intended for MF and HF use and is not suitable for use above 54 MHz. Also consider DX Engineering 300 Ohm Ladder Line, DXE-LL300, an excellent alternative low-loss HF feed line that reduces impedance extremes on non-resonant HF multiband antenna systems.
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$792.99
Times Microwave Systems® Bulk Coaxial Cables
Times Microwave Systems Bulk Coaxial Cables are recognized as superior RF cable products. The standard Times Microwave LMR® is a UV-resistant polyethylene jacketed cable designed for 20-year service in outdoor use. Depending upon size, LMR® cable has a solid copper or copper clad solid aluminum center conductor. Their bending and handling characteristics are significantly better than air-dielectric and corrugated hard line cables. LMR-DB® cable has a waterproofing compound to prevent moisture intrusion after a minor abrasion. Times Microwave Systems EZ Series and TC Series connectors are suitable for use on standard LMR® and LMR-DB® cables. Times Microwave Systems LMR® UltraFlex (UF) cables have a stranded bare copper center and a rubber jacket (black thermoplastic elastomer) designed for repeated bending. Times Microwave TC Series crimp connectors are designed for use on LMR® UltraFlex cables. LMR®'s RF shielding is typically 50 dB greater than standard coax. The copper shield and multi-ply bonded foil outer conductor is rated conservatively at greater than 90 dB. That's better than 180 dB isolation between two adjacent cables. A wide variety of connectors are available for LMR cables, including all common interface types, reverse polarity, and a choice of solder or non-solder center pins. Most LMR connectors employ crimped outer attachment using standard hex-crimp methods. Times Microwave Systems is a premier supplier of coaxial cable products worldwide. Only Times offers a range of products specifically developed to perform as needed in the most diverse range of environments. Times Microwave Systems has over 60 years of experience in building the highest-quality cables. Order LMR® coaxial cables from DX Engineering and put Times Microwave Systems Bulk Coaxial Cables to work for you! LMR® is a registered trademark of Times Microwave Systems.
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$874.99
DX Engineering Phased Array Quarter Wave Tuned Cables
DX Engineering Phased Array Quarter Wave Tuned Cables ensure optimum pattern control and gain from your phased antenna system. These cables are custom built to your array frequency, made with the highest quality waterproof PE jacketed, direct-burial RG-11/U 75-ohm low-loss foam coaxial cable and terminated with silver plated PL-259s. From the system phasing unit to each array element, these phasing feed-lines are one quarter wavelength long electrically, which differs from the free-space dimension by the velocity factor of the cable. The electrical dimensions of these cables are critical to system performance. These cables, manufactured to DX Engineering specifications, have a nominal velocity factor of 0.82, providing plenty of physical length for easy burial and routing from the base of the vertical to the center-mounted controller. DX Engineering Phased Array Quarter Wave Tuned Cables are custom built by DX Engineering. Each is hand crafted and electronically tuned to a specific HF frequency. Typically, they are tuned to the same frequency as the antenna array. After placing your order for DX Engineering Phased Array Quarter Wave Tuned Cables, please inform us of the order number and your array frequency for your tuned cables by e-mailing dxengineering@dxengineering.com or by calling 800-777-0703 or 330-572-3200. You may leave a message after business hours. Custom cable assembly orders will process after we receive your frequency information. Please contact DX Engineering Technical Support if additional assistance is needed. We will contact you if we have any questions about your special order.
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$899.99