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7 Results Found For "noise"
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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$1.18
Phillystran HPTG-I High Performance Broadcast Tower and Antenna Guy Lines
Phillystran HPTG-I High Performance Broadcast Tower and Antenna Guy Lines are constructed from tough Aramid fiber. Aramid fiber features excellent dielectric properties and a strength-to-weight ratio five times greater than steel guy wire! Add to that their low-stretch and low-creep characteristics—and you have an ideal material for broadcast tower guys. Today's Phillystran tower guying systems based on Aramid fiber are the result of many years of real-world experience. Phillystran HPTG-I systems eliminate the problems associated with EHS steel cable, such as electromagnetic interference (EMI), radio frequency interference (RFI), signal suppression, directional irregularities and white-noise arcing. You may not have a broadcast tower, but your Amateur Radio tower can benefit by using Phillystran HPTG-I High Performance Broadcast Tower and Antenna Guy Lines from DX Engineering!
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$0.99
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$3.75
DX Engineering CW1812OR Heavy-Duty Spec Rotator Cable
Made to our specifications, DX Engineering CW1812OR Heavy-Duty Spec Rotator Cable is a rugged, waterproof, direct-bury and UV-resistant cable that we offer cut-to-length. This cable is required by the DXE-RT4500HD Heavy Duty Rotators, and OR-2800 positioners, for runs up to 400 ft., this control cable is also useful for prop-pitch motors and many other high-torque, heavy-duty rotators that use two-wire DC drive and a shielded pair for pulse position feedback. This is also great cable for relay power control and remote preamplifier systems located far from the station. To ensure the pulse positional information arrives to your controller without RF or noise, DX Engineering CW1812OR features a twisted pair of 18 AWG 16-strand tinned copper conductors with orange and blue PVC insulation that are encased in an aluminum tape foil shield, complete with an a tinned-copper 18 AWG 7-strand drain wire. The positioner motor is served with two 12 AWG 65-strand low-resistance, unshielded tinned-copper conductors with black and white PVC insulation, wrapped in clear tape. This heavy cable bundle is covered in a tough, 35 mil waterproof black polyethylene jacket that is about 0.375 inch diameter overall. This direct-bury capable and UV-resistant cable has markings that designate DXE-CW1812OR 18/2C with Shield plus 12/2C, with 300V and 75 degrees Celsius ratings, and RoHS compliance. Your investment in a high-quality, heavy-duty rotator deserves the proper control cable. DX Engineering CW1812OR Heavy-Duty Spec Rotator Cable is ready to be ordered in any US ft. length for your directional antenna positioning system.
( 5 )
$2.05
DX Engineering 300 Ohm Ladder Line
DX Engineering 300 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 2.5 kW of RF power, DXE-LL300 is a very low-loss transmission line across HF that is ideal for long feedline runs. It is an excellent feedline choice for a low band non-resonant wire antenna operated on multiple bands on which the impedance varies significantly, causing mismatches and elevated SWR. Unlike coaxial cables, DX Engineering DXE-LL300 Ladder Line maintains low RF losses at frequencies where impedance mismatches cause high SWR. The lower impedance of DX Engineering 300 Ohm Ladder Line is actually better suited than 450 ohm ladder line for limiting the impedance extremes of non-resonant multiband antennas. It can provide significantly higher efficiency than coaxial cable for feeding non-resonant antenna systems that are matched with a wide impedance range antenna tuner. DXE-LL300 Ladder Line is a flat, high-quality RF feedline, about 0.438 in. wide with two 18-gauge copper-clad steel wire conductors that provide the strength to hold up for long spans between supports without twisting. It exhibits a nominal impedance of 275 Ohms and a nominal Velocity Factor of 88 percent. For proper performance, LL300 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-LL300 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. Most often used for non-resonant wire doublet antennas, dipoles, and inverted-vees, DXE-LL300 can be more easily terminated outdoors to 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 instead of 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-LL300 is sold by the foot, previously sold as DXE-LL300-CTL, this is the same ladder line with a new part number. It is also available in spools of 500 ft. DXE-LL300-5C and 1,000 ft. DXE-LL300-1K. NOTE: This type of feedline is intended for MF and HF use and is not suitable for use above 30 MHz.
( 25 )
$0.77
RG-400 High-Isolation Double-Shield 50-ohm Coaxial Cable
RG-400 is a high-isolation 50-ohm coaxial cable that is ideal for critical, very low signal level, low noise applications as well as high power handling for RF equipment interconnections. Proper terminations on RG-400 cable assemblies provides extremely low crosstalk and very low noise ingress with a double-braid shielding effectiveness that results in over 100dB of isolation across HF frequencies. This cable is Mil-Spec equivalent to M17/128-RG400. RG-400 is compatible with N-type and PL-259 solder type connectors with UG-175S reducers for RG-58 size cables. NOTE: RG-400 has an OD of 0.195 inch and is NOT the same as DXE-400MAX which is 0.405 inch OD. RG-400 Specs: Center Conductor: Silver Plated Copper – 20AWG Center Conductor Diameter: 0.0384 in. (19 strands of 0.008 in.) Dielectric: PTFE (Polytetrafluoroethylene) Dielectric Diameter: 0.116 in. Shield Construction: Two Layers of Braided Silver Plated Copper Shield Outer Diameter: 0.156 in. Jacket: FEP (Fluorinated ethylene propylene) Cable Overall Diameter: 0.195 in. Minimum Bend Radius: 1.0 in. Weight (lbs. per 1,000 ft.): 50.0 Capacitance: 29.4 pF/ft. Maximum Voltage: 1,900 V Velocity factor (VF), nominal: 69.5% (0.695) Click "More Detail" for more information
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$7.49
Consolidated Wire Multi-Conductor Control Cable
Consolidated Wire Multi-Conductor Control Cable is available from DX Engineering for connection of remote electronics at a typical Amateur Radio station installation. This multi-conductor cable is flexible and features annealed stranded tinned copper wire that is RoHS, UL, and CSA compliant. Insulation is color coded PVC with a chrome gray PVC outer jacket and a temperature range of -20°C to +80°C. This cable is constructed with annealed stranded tinned copper wire, color coded insulation and Polyester aluminum foil shields with an annealed stranded tinned copper drain wire. This electromagnetic shield minimizes noise and interference to maintain clarity of signals and also reduces electromagnetic radiation. For nearly 100 years, Consolidated Electronic Wire & Cable has delivered custom cable solutions to various industries for a wide range of applications, including multi-conductor cable arrangements for communications professionals.
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$0.84
Chelegance JCABLE-FC50 USB-C to USB-C Cables
Chelegance JCABLE-FC50 USB-C to USB-C Cables are 19.7 in. long and feature a ferrite choke to assist in RF noise suppression. This cable features braided copper wires with dual aluminum foil shielding. This cable is capable of both charging and data transfer, meaning it has multiple uses in the shack.
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$3.99