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53 Results Found For "in-line"
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
COMTEK Current Feedline Chokes
The updated COMTEK CFC-50A 50 ohm Feedline Chokes consist of 75 heavy-duty mix-31 RF choke beads on a length of RG400 PTFE coax terminated at both ends with silver-plated PTFE PL-259/UHF male connectors and the correct length of heat-shrink tubing. COMTEK Current Feedline Chokes ensure that stray RF does not flow on the outside shield of your feedlines. They are typically installed at the antenna feedpoint connection. They may also be used where a long run of feedline leaves a remote antenna switch or a tower. They are also very effective at the shack end of a long run of on-the-ground or above-ground coaxial feedline, to block unwanted RF signals and noise picked up on the shield. These chokes provide excellent common mode impedance and handle up to 5 kW from 1.8 to 54 MHz. These chokes are assembled except for the tubing needs to be installed and heat-shrinked after the choke is positioned as it will be installed.
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$131.49
I0JXX LNA Receive Preamplifiers
I0JXX LNA Receive Preamplifiers offer high gain amplification with very low internal noise for VHF and UHF amateur band optimized devices used world-wide by experimenters and contest enthusiasts. Excellent receive-only performance at low current is achieved by these compact 12VDC units, available in two connector configurations: SMA female input and output, or Type N male input and female output. LNA (low noise amplifiers) offer preamplification using ultra-low noise components as good or better than most receiver front ends, to preserve the capabilities of a low-noise antenna system. Typically, they do not have relays in the signal path that might introduce noise or loss. These devices can be used directly in most receive applications and may be used to build a sequencer-controlled Receive-Transmit relay system for two-way VHF or UHF communications. I0JXX LNA Receive Preamplifiers are built with high quality components including low-loss FR4 copper clad PCBs and environmentally safe tri-chrome high-conductivity passivated aluminum chassis. View the specific device specifications on each part detail page.
Not Yet Reviewed
$191.99
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$223.99
Ciro Mazzoni Loop Antenna Replacement Parts
Ciro Mazzoni Loop Antenna Replacement Parts are stocked for those who need to update or reinstall their Loop Antenna by I3VHF. Parts are all original; exactly the same supplied with each model, MIDI, BABY and STEALTH models, including Actuator motors and Isolator Arms. The updated, current model ATU 2.0 replacement (MZZ-COM1001) is the same as supplied with all three new antennas. So are the Universal AC Power Supply (MZZ-COM1002) and the USB Keyboard (MZZ-COM1003). The Stainless Steel Mast Clamp and hardware (MZZ-COM1005) fit the MIDI or the BABY Loops. The MZZ-BLA1010 aluminum adapter plate is supplied with BABY Loop Tripods, available here as a replacement. Order Loop Antenna by I3VHF Replacement Parts here at DX Engineering.
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$105.99
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$122.99
Momobeam RFC-LI 1kW Single Core Line Isolator RF Choke Baluns
Momobeam RFC-LI 1kW Single Core Line Isolator RF Choke Baluns are efficient broadband common mode current chokes designed to ensure proper current balance and clean transitions between balanced resonant antennas—such as dipoles and Yagi antennas—and unbalanced coaxial feed lines. By delivering excellent suppression of unwanted common mode current across a wide frequency range, these RF chokes help maintain optimal antenna performance and protect sensitive station equipment. Common mode currents can cause a variety of station problems, including elevated receiver noise levels, inaccurate SWR measurements, and interference affecting nearby electronic devices or equipment within the shack. The RFC LI effectively prevents these issues by stopping common mode current from traveling on the outside of the coaxial shield, ensuring cleaner transmit and receive performance under all operating conditions.
Not Yet Reviewed
$144.99
Momobeam RFC-LI 2kW Dual Core Line Isolator RF Choke Baluns
Momobeam RFC-LI 2kW Dual Core Line Isolator RF Choke Baluns are efficient broadband common mode current chokes designed to ensure proper current balance and clean transitions between balanced resonant antennas—such as dipoles and Yagi antennas—and unbalanced coaxial feed lines. By delivering excellent suppression of unwanted common mode current across a wide frequency range, these RF chokes help maintain optimal antenna performance and protect sensitive station equipment. Common mode currents can cause a variety of station problems, including elevated receiver noise levels, inaccurate SWR measurements, and interference affecting nearby electronic devices or equipment within the shack. The RFC LI effectively prevents these issues by stopping common mode current from traveling on the outside of the coaxial shield, ensuring cleaner transmit and receive performance under all operating conditions.
Not Yet Reviewed
$180.99
Momobeam RFC-LI 4kW Dual Big Core Line Isolator RF Choke Baluns
Momobeam RFC-LI 2kW Dual Core Line Isolator RF Choke Baluns are efficient broadband common mode current chokes designed to ensure proper current balance and clean transitions between balanced resonant antennas—such as dipoles and Yagi antennas—and unbalanced coaxial feed lines. By delivering excellent suppression of unwanted common mode current across a wide frequency range, these RF chokes help maintain optimal antenna performance and protect sensitive station equipment. Common mode currents can cause a variety of station problems, including elevated receiver noise levels, inaccurate SWR measurements, and interference affecting nearby electronic devices or equipment within the shack. The RFC LI effectively prevents these issues by stopping common mode current from traveling on the outside of the coaxial shield, ensuring cleaner transmit and receive performance under all operating conditions.
Not Yet Reviewed
$229.99
COMPACtenna 2M/440+ Optimized High Performance Dual-Band Ham Radio Antenna
COMPACtenna 2M/440+ provides high performance using a unique Electric-Magnetic Field Diversity design, Patent No. 9,407,001. Superior Omni-directional coverage is achieved far beyond what would be expected for the antenna size. The multi-faceted geometric design of the antenna includes "extended flat monofilar spiral Tesla-like coils" that serve as the LCR matching system, resonating as an integral part of the signal field generation. No external or internal electronic lossy matching components are used. This design establishes diverse electromagnetic fields resulting in signal stability and performance greater than expected in NLOS (Non-Line-Of-Sight) environments, reducing the effects of ionospheric polarization shifts. COMPACtenna 2M/440+ Specifications: * Frequency Coverage: 144-148 MHz, 430-450 MHz * Power Rating: 100 W 2M; 75 W 70cm * Duty Cycle, Max. Power: 1 minute transmit limit in a 2-minute period * Repeater Operation: 30W maximum at the antenna * Maximum Ambient Temperature: 130 degrees F (hotter conditions, sun exposure, limited air flow reduces duty cycle) * Gain: +5 dB-MEG: Due to diverse EM fields of the Magnetic Field Resonator, performance is greater than predicted by singular polarization field-range tests * SWR, nominal: < 2.1:1 144-148 MHz, 430-450 MHz. Best SWR on VHF frequencies when COMPACtenna 2M/440+ antenna is mounted on an upper corner of a vehicle, NOT center mount. Flat style magnetic mounts provide the best SWR results. SWR varies with size and shape of the vehicle.
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$199.00
DX Engineering Clifton Laboratories Z10046 High-Gain Preamplifiers
DX Engineering Clifton Laboratories High-Gain Preamplifiers are adapted, assembled versions of the circuit project kits developed by Jack Smith, K8ZOA (SK). This is our version, the DXE-Z10046B-PM High-Output Preamplifier with 23dB gain, which is virtually identical to its predecessor in specs and performance. This versatile module preamp can plug directly into the DXE-NCC-2 and DXE-RTR-2 units. Also, you can easily create a separate high-performance in-line receive-only preamplifier with the DXE-Z10046B-PM module installed in our DXE-DMC-2 Dual Module Chassis. The legacy built by Jack Smith, K8ZOA (SK) with Clifton Laboratories lives on with select products by DX Engineering.
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$109.99
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
4O3A RS3000 Reversible Switch Controllers
4O3A RS3000 Reversible Switch Controllers are designed to improve the safety and efficiency of the RS3000 2x2 Reversible Coaxial Crossover Switch system. They ensure switching between radios and antennas only occurs when neither connected radio is transmitting, preventing accidental switching if one user begins transmitting while the other is still on the air. This makes it ideal for SO2R (Single Operator, Two Radios), MS (Multi-Single), or M2 (Multi-Two) contest configurations. These switch controllers operate on 13–15VDC input. A 3-pin DC output (5.08 mm pin header) connects to the RS3000 Crossover Switch. Before use, connect the PTT lines from both radios to the controller's RCA jacks. The controller connects to the RS3000 switch via the +12V/GND terminals. If a user attempts to switch while the other is transmitting, the controller delays the switch until the PTT line is inactive. During this delay, the "Wait" LED is illuminated. This ensures safe switching regardless of transmission frequency.
Not Yet Reviewed
$149.99
DX Engineering Maxi-Core® 20 Baluns and Feedline Chokes
The present-day DX Engineering was launched in the year 2000. To celebrate our 20th Anniversary in the year 2020 we have developed a new line of Baluns and Feedline Chokes. Introducing DX Engineering "Maxi-Core® 20" Baluns and Feedline Chokes. They reduce or eliminate currents on the outside of your feedline allowing you to hear and to be heard much better. They keep more RFI/BCI out of your antenna and receiver and transfer more of your transmitted signal to the antenna for higher efficiency, the best antenna pattern and maximum performance. Signaling a new era of RF performance across the 1.8 to 54 MHz frequency range, DX Engineering Maxi-Core® 20 Baluns and Feedline Chokes handle full-legal-power-plus and provide higher common mode impedance (CMI) across a greater frequency range than competing models and even previous DX Engineering and Comtek models. Years of R&D coupled with major advancements in test equipment and techniques combined with custom ferrite materials have allowed our engineering team to design the DX Engineering Maxi-Core® 20 Baluns and Feedline Chokes. Maxi-Core® 20 Baluns and Chokes have high CMI across the AM Broadcast band and the HF/6M spectrum, which is essential to provide sufficient suppression of unwanted transmitted and received RFI/BCI current on the feedline shield exterior. Hear and be heard with DXE Maxi-Core® 20 Baluns and Feedline Chokes. Choose superior performance from these models: * DXE-MC20-1-1 Maxi-Core® 20 - 1:1 Current Choke Balun - For all HF-6m balanced antennas with a 50 ohm feedpoint, including resonant dipoles, loops, Yagis, beams, etc. * DXE-MC20-FC Maxi-Core® 20 - 1:1 Feedline Choke – This high CMI line isolator is perfect for use in line on 50 ohm coaxial feedlines, at the antenna, tower or shack end of the feedline. * DXE-MC20-1-1T Maxi-Core® 20 - 1:1 Current Choke Balun – This 1:1 "T" model is for force feeding antennas with a tuner. Use it at the end of ladder line of any impedance or mounted on a coax fed non-resonant antenna. This model tolerates operation at high SWR on non-resonant multi-band antennas. * DXE-MC20-C4-1 Maxi-Core® 20 - 4:1 Current Choke Balun is for use on antennas with a 200 ohm feedpoint and at the end of any impedance ladder line, especially on antenna systems with higher impedance. This model tolerates operation at high SWR on non-resonant multi-band antennas. * DXE-MC20-V4-1 Maxi-Core® 20 - 4:1 Voltage Balun is a 200 ohm to 50 ohm transformer for use on random long-wire and OCF antenna applications. This true voltage balun is intentionally designed with low CMI for antennas that need a transformer without RF choking for easier antenna tuner operation and it tolerates elevated SWR. Maxi-Core® 20 Baluns and Feedline Chokes are built into a convenient weather resistant NEMA enclosure that is mounted easily with optional brackets. They feature 1/4-20 stainless steel hardware and a high quality silver-plated PTFE dielectric SO-239 (UHF female) input connector. The SO-239 connector limits power handling to 5 kW at low SWR and reduced power at elevated SWR. These baluns and the feedline choke exhibit very low insertion loss and inherently low SWR. Optional mounting brackets are available for use on wire antennas or for verticals, Yagi and beam antennas. See the Suggested Parts tab after clicking "More Detail" on the model of interest. Combination packages that include balun or choke and mounting bracket are also available.
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$141.99
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$169.99
COMPACtenna Model 2M/220/440 Tri-Band NMO Mobile Antennas
COMPACtenna Model 2M/220/440 Tri-Band NMO Mobile Antennas COMPACtenna Model 2M/220/440 Tri-Band NMO Mobile Antennas are very small, high performance dual-band antennas. Even though they're only 7.5 inches tall, they provide superior Omni-directional coverage far beyond their size, using a unique Electric-Magnetic Field Diversity patented* design. These are attractive, rugged and weatherproof radome style mobile antennas that will allow vehicle passage into most garages, drive-through lanes and even under low tree branches without having to remove or tilt the antenna structure. COMPACtenna NMO Mobiles are easy to install and use, requiring no tuning. This Tri-band model covers three of the most popular VHF and UHF amateur bands. A typical SWR under 2:1 across the frequency ranges 144-148 MHz, 219-225MHz and 420-450MHz, depending only upon the vehicle mount or base mount position. This antenna handles up to 85W on the 2M band and 50W on 220 MHz and 440 MHz. It also provides excellent wide-band receive coverage from 100-1500 MHz. Its industry standard NMO base is compatible with a number of NMO vehicle magnet mounts, grounded NMO hole-mounts, hatch or trunk lip mounts or angle bracket mounts. The required NMO mount is not included with the antenna, but is available from DX Engineering. The revolutionary COMPACtenna Model 2M/220/440 Tri-Band NMO Mobile Antenna is also configurable as an indoor base or as an inconspicuous, outdoor base antenna by adding an optional CompacCounterpoise. *Patent No. US 9,407,001 – Unique Electric/Magnetic Field Diversity Science & Technology Patented Design
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$199.00
COMPACtenna Model 2M/440 Dual-Band NMO Mobile Antennas
COMPACtenna Model 2M/440 Dual-Band NMO Mobile Antennas are very small, high performance dual-band antennas. Even though they're only 7.5 inches tall, they provide superior Omni-directional coverage far beyond their size, using a unique, patented* Electric-Magnetic Field Diversity design. These are attractive, rugged and weatherproof radome style mobile antennas that will allow vehicle passage into most garages, drive-through lanes and even under low tree branches without having to remove or tilt the antenna structure. COMPACtenna NMO Mobiles are easy to install and use, requiring no tuning. This dual-band model covers the two most popular VHF and UHF amateur bands, 2 meters and 70 centimeters. A typical SWR under 2:1 across the frequency ranges 144-148 MHz and 420-450MHz, depending only upon the vehicle mount or base mount position. This antenna handles up to 85W on the 2M band and 50W on 70 cm. Its industry standard NMO base is compatible with a number of NMO vehicle magnet mounts, grounded NMO hole-mounts, hatch or trunk lip mounts or angle bracket mounts. The required NMO mount is not included with the antenna, but is available from DX Engineering. The revolutionary COMPACtenna Model 2M/440 Dual-Band NMO Mobile Antenna is also configurable as an indoor base or as an inconspicuous outdoor base antenna by adding an optional CompacCounterpoise. It may be mounted in an attic or other stealth location. *Patent No. US 9,407,001 – Unique Electric/Magnetic Field Diversity Science & Technology Patented Design
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$186.00
DX Engineering AVA-3 Active Matching Units
DX Engineering AVA-3 Active Matching Units are state-of-the-art broadband receive RF operational amplifiers that achieve unparalleled weak signal reception across the radio frequency range from 40 kHz* to 30 MHz. They work as a high impedance buffer between a short antenna element of 6 to 24 feet and an economical 75 ohm feedline. The AVA-3 and a short element are intended to be mounted on a ground rod at ground level in a clear area away from all metal, towers and other antennas. The gain adjustable AVA-3 is the sole upgrade and drop-in replacement for all discontinued receive array element amplifiers including Hi-Z Antennas AMP, PLUS6-AMP, AMP-V2 and AMP-PLUS-V2 as well as DXE-AVA-2 and AVA-1. The DXE-AVA-3 Active Matching Unit is the heart of the new line of DX Engineering Receive Short Element Active Vertical Antennas, DXE-RSEAV-1. Compared to large antennas, this amplified short element method dramatically improves signal-to-noise performance for excellent VLF, LF and HF weak signal reception. Click or tap the title of the listed item for an overview - a complete description, Specifications, Required and Suggested Parts. Links to instruction manuals and charts appear in Documentation. The AVA-3 Active Matching Unit provides these features and benefits: • Ultimate frequency coverage of 40 kHz* to 30 MHz for VLF through HF (including the 2200m and 630m Amateur bands) • High Third Order Intercept (TOI) Performance +39dBm for superior strong signal handling equal to top transceivers • Consistent unit to unit gain for greatly improved array performance • Virtually Flat Gain (+/-0.4 dBm) across the entire frequency range • Internally settable gain (default -6, 0, or +6 dBm) for different ambient noise locations and element sizes • Direct DC via second F connector – internal settable choice for separate DC and RF coaxial cables for best performance, or standard Bias Tee DC on the RF coax • Each DXE-AVA-3 Active Matching Unit operates on 12 -15 VDC at 25mA • Element is grounded when power is removed • 75 ohm F connectors support field serviceable RG-6 Quad Shield suitable up to 1,000 feet for VLF through HF *Frequency coverage below 200 kHz requires Direct DC on a separate DC only coaxial cable. Please Note: To achieve the expected reception pattern, multi-element phased arrays depend upon identical gain and phase response from each element. Every individual element amplifier, its grounding, and even its feedline characteristics and length, must be identical to the others in the array. Therefore, when unrepairable failures occur, it is essential to replace and upgrade all the element amplifiers in the array with fully compatible DXE-AVA-3 units.
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$139.99
WiMo QRM Eliminator
The WiMo QRM Eliminator is a simple signal phasing device that can effectively reduce or remove noise interference for dramatically improved reception from 3.5 to 60 MHz. The QRM Eliminator is based on a totally innovative concept and cannot be compared to the performance of noise blanker or DSP circuits. Removing the noise before it gets to the receiver is the superior method of interference reduction. With the WiMo QRM Eliminator you can get rid of local interference almost entirely, up to an S9 level, with the likely result of completely clear reception! You don't have to understand the cause or type of interference nor do you need to know the location of its source. It doesn't matter if the interference originates from your own station or from a welding unit hundreds of feet away. The QRM Eliminator simply connects to the antenna port of transceiver and to the antenna (or amplifier input), without any radio modifications required. An additional user supplied auxiliary receiving antenna is required, such as a properly positioned 8 ft. outdoor dipole antenna or a simple 20 ft. wire in the shack, for example. This "noise sense" antenna receives mostly unwanted signal, while the transmitting antenna receives the same interference in a different phase along with the desired signal. The QRM Eliminator allows the adjustment of the amplification and phase to cancel out the unwanted signal before it reaches the receiver front end! Noise or interference nulling can provide over 45 dB of unwanted signal suppression, in many cases resulting in clear reception of the desired signal. The QRM Eliminator is built into a shielded metal enclosure, functions over the frequency range of 3.5 through 60 MHz, and has a status LED to indicate when the unit is turned on for phasing. The unit has a built-in T/R relay with PTT control via a rear panel RCA phono connector for the transceiver amplifier keying line. The QRM Eliminator automatically switches the Main antenna connection to the transceiver during transmit. Also, simply turn the unit off to bypass the phasing unit for normal reception on the Main transmit antenna. Click "More Detail" below to see additional information about this exciting device. You may not believe the power of interference phase nulling until you have experienced it for yourself. Order the WiMo QRM Eliminator exclusively in North America from DX Engineering.
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$229.99
Diex Antennas Single-Band Full Size Rigid Rotatable Dipoles
Diex Antennas Single-Band Full Size Rigid Rotatable Dipoles provide coverage of one specific HF band. Built as a full-size resonant dipole, Diex aluminum tubing antennas provide excellent performance and are handled with a lighter tower and smaller rotator, offering a very economical alternative to the expense of a Yagi. Crafted with precision in Brazil using quality materials, they are designed to withstand tough environments assuring long-lasting service. They are packed partially assembled, saving valuable time and effort. Typically mounted on a rotating mast, these single-band HF antennas provide very good directionality depending upon installed height above ground. They feature the flexibility of physical adjustments to set the lowest SWR to a specific frequency. Diex Antennas Single-Band Full Size Rigid Rotatable Dipoles power handling is 1,500W+ PEP, which is further limited if using an antenna tuner. NOTE: Diex Antennas recommends that HF antennas should be mounted on a tower at a minimum height of 33 to 50 ft. (10 - 15 meters) above ground level and must be installed in the clear, away from power lines, trees, buildings or other towers and antennas.
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$115.99
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$209.99
Chameleon Antenna EMCOMM-III-B HF Base Antenna
Chameleon Antenna EMCOMM-III-B HF Base Antenna is an effective multi-band High Frequency (HF) antenna specially designed for short to long range base station HF communications. Due to configuration and installation flexibility and low-visibility design, it is ideal for home use even in developments with a Home Owners Association (HOA) and Covenants, Conditions, and Restrictions (CCRs). It is also highly suitable for military, government agencies, non-governmental organizations (NGOs), Military Affiliate Radio System (MARS), Civil Air Patrol (CAP), Amateur Radio Emergency Service (ARES) / Radio Amateur Civil Emergency Service (RACES), Salvation Army Team Emergency Radio Network (SATERN), and shortwave listening. The EMCOMM III Base antenna is configurable to facilitate both long distance (DX) and Near-Vertical Incident Sky wave (NVIS) communication and using an automatic antenna tuner or coupler with memory settings will support most Automatic Link Establishment (ALE), frequency-hopping, and spread- spectrum modes and operations. SWR: Subject to frequency and configuration, but typically less than 2.7:1. An antenna tuner or coupler may be required depending upon frequency and configuration. The EMCOMM III Base antenna can be installed by the operator in less than 30 minutes. It should be installed as high and straight as possible, but almost any available supports, such as an existing antenna tower, trees, a flag pole, the eaves of a house, or a non-conductive fence can be used with satisfactory results. The EMCOMM III Base antenna is comprised of a matching transformer and a 130 foot antenna wire on a line winder - making an effective HF base station antenna system for permanent installation as a primary or backup HF base station antenna. Specifications: * Frequency: 80M - 10M * Power: 200 watt SSB or 100W CW/Digital * Length: 130 ft. Copper Clad Kevlar® PTFE (-70 degrees C to 150 degrees C) wire * Weight: 2.2 Lb. The antenna system consists of: * 1 X CHA EMCOMM III matching box * 1 X 130 ft. Copper Clad Kevlar® Wire
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$195.00
COMPACtenna CompacCounterpoise NMO Mount Base Station Ground Plane
COMPACtenna CompacCounterpoise is a unique NMO Mount Ground Plane Radial Kit that turns the amazing mobile COMPACtenna models into sturdy, and stealthy, base station antennas. With four - 45 degree angled radials, optimized signal and SWR for VHF and UHF is now available for base station use of these COMPACtenna models: CAN-2M-440 CAN-2M-440PLUS CAN-2M-220-440 CAN-220MAX CAN-SCAN-III CAN-LMR-I With the CompacCounterpoise, these models are excellent for Base Station and Repeater use, particularly for low height above average terrain (HAAT) installations, where Non-Line of Sight (NLOS) propagation is substantial. Broad elevation coordinate signal pattern and elliptical polarization of COMPACtenna provide stabilized signals in our common Non-Line of Sight environments, with temperature and humidity inversion pathways, as well as tropospheric propagation and satellite communications. The CompacCounterpoise works well as an NMO mobile antenna base station mount for many other monoband or multi-band NMO mount antennas in the 144 to 512 MHz (144-1000 MHz COUNTERPOISE-N model) transceive range and above 512 MHz for scanner-monitoring uses. When not using a COMPACtenna model, results are dependent upon the NMO mount mobile antenna used (antenna not supplied with CompacCounterpoise). The CompacCounterpoise includes the 3 in. diameter mounting plate with mast bracket, clamps, four 18 in. radials and stainless steel hardware. This assembly includes the top flush mount NMO with gasket, a bottom SO-239 for PL-259 coaxial cable attachment on the CAN-COUNTERPOISE model and an N Female connector on the CAN-COUNTERPOISE-N model (coax cable not supplied). The mount's maximum power rating is 200 W up to 225 MHZ and 100 W on higher frequencies.
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$199.00
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$209.00
DX Engineering Maxi-Core® 20 Feedline Choke and Mount Kits
DX Engineering Maxi-Core® 20 Feedline Choke and Mount Kits, DXE-MC20-FCM, provide current balance and feedline isolation on coaxial cables for all types of HF through 6 meter antennas including verticals, rotatable dipoles, directional beams and Yagi antennas. Intended for 50 ohm feedlines operated at low SWR, this combination of mounting plate bracket and effective 50 ohm RF choke handles full-legal-power-plus and provides higher common mode impedance (CMI) across a greater frequency range than competing feedline choke and line isolators and previous DX Engineering and Comtek models. High CMI across the AM Broadcast band and the HF/6M spectrum is essential to provide sufficient suppression of unwanted transmitted and received RFI/BCI current on the feedline shield exterior. With less noise and interference you will hear and be heard using a DX Engineering Maxi-Core® 20 Feedline Choke and Mount Kits. DX Engineering Maxi-Core® 20 Feedline Choke and Mount Kits bring new parts together to work on many types of antennas. They provide improved RF isolation and current balance at either end of the feedline and at the feedpoint of a vertical, a beam, rotatable dipole or other antenna feedline. This is a unique perpendicular choke mount that allows a beneficial separation between the ferrite of the choke and the antenna boom or mast, resulting in improved choking performance compared to a choke mounted on metal. The UV black high-strength polymer mounting plate provides additional isolation and holes for different mounting positions for the choke, horizontal or vertical. Stainless steel hardware is included to attach the plate to the stainless steel mounting bracket, which has laser cut holes for one of five optional DX Engineering Saddle Clamps to cover mast or boom sizes from 1 to 2 in. and 2.375 to 3 in. Click "More Detail" for additional information and click Suggested Parts for required optional items including one saddle clamp to fit your mast or boom and coaxial cable assemblies. Maxi-Core® 20 Feedline Chokes features high quality silver-plated PTFE dielectric SO-239 (UHF female) connectors. The SO-239 connector limits power handling to 5 kW or less at low SWR and reduced power at elevated SWR. These feedline chokes exhibit very low insertion loss and inherently low SWR. They are built into a convenient weather resistant NEMA enclosure with weep holes at all four corners of the "bottom" side of the enclosure, to vent properly when mounted vertically or horizontally for all types of antennas. Make your antenna play to its potential; reduce RFI and improve reception with DX Engineering Maxi-Core® 20 Feedline Choke and Mount Kits.
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$207.98
DX Engineering CC-4 Four Position Control Consoles
The DXE-CC-4 Four Position Control Console is used for remote switching of relay control devices requiring 1 of 3 positive voltage control lines with a ground return. This control console is directly compatible with: SSB Electronic Four-Port Mast-Mount Antenna Switches: AS-304 N (ESB-5050) AS-304 UHF (ESB-5053) WIMO Remote Polarization Switches: WMO-18080 WMO-18081 WMO-18082 WMO-18083 Unified Microsystems Receive Antenna Switch: UMS-RAS-4 (The DXE-CC-4 is an essential component for manual control of the UMS BevFlex-4X-Q Four-Direction Reversible Beverage Antenna System.) The DXE-CC-4 can be used in other applications using this control scheme: Control SWITCH Control Console Output Terminal 1 Terminal 2 Terminal 3 Position 1 - LED1 - ON 0 0 0 Position 2 - LED2 - ON +13.8 VDC 0 0 Position 3 - LED3 - ON 0 +13.8 VDC 0 Position 4 - LED4 - ON 0 0 +13.8 VDC The DXE-CC-4 Four Position Control Console features: • Large Rotary Knob • Stainless Steel Housing • Non-Skid feet • On-Off toggle switch • Four green LEDs indicate position chosen • Erasable position label fields • Filter capacitors on each line • Internal automatic resettable fuse • Includes a 2.1 mm power plug for +13.8 VDC power connection
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$161.99
CHAMELEON ANTENNA EMCOMM-III-P Portable HF Antenna
CHAMELEON ANTENNA EMCOMM-III-P Portable HF Antenna is specially designed for short to long range portable and man-pack HF communications. The EMCOMM III Portable antenna is ideal for hiking, backpacking, and both tent and Recreational Vehicle (RV) camping. It is also highly suitable for military, government agencies, non- governmental organizations (NGOs), Military Affiliate Radio System (MARS), Civil Air Patrol (CAP), Amateur Radio Emergency Service (ARES) / Radio Amateur Civil Emergency Service (RACES), Salvation Army Team Emergency Radio Network (SATERN), and amateur radio operators (hams) involved in field communication and disaster preparedness. The EMCOMM III Portable antenna is configurable to facilitate Near-Vertical Incident Sky wave (NVIS) communication and will support most Automatic Link Establishment (ALE), frequency-hopping, and spread- spectrum modes and operations. An antenna tuner or coupler may be required for in some instances. The EMCOMM III Portable antenna can be deployed by the operator in the field in less than 15 minutes, using almost any available support, with no masts or guying required. The EMCOMM III-P Portable antenna is comprised of a matching transformer, a 73 foot antenna wire on a line winder, and a 25 foot counterpoise - making a highly portable and effective HF antenna system. CHAMELEON ANTENNA EMCOMM-III-P Portable HF Antenna Specifications: - Frequency: 160M - 6M (dependent upon tuner) - Power: 100W SSB or 50W CW - Length: 73' + 25" Copper Clad KEVLAR PTFE (Teflon) (-70°C to 150°C) wire - Weight: 1.5 Lb. The EMCOMM-III-P Portable HF Antenna system consists of: 1 X CHA EMCOMM III matching box 1 X 73' Copper Clad KEVLAR Wire (Radiator) 1 X 25' Copper Clad KEVLAR Wire (Counterpoise)
( 12 )
$190.00
Chelegance JBalun-915 1:1 Feedline Chokes
Chelegance JBalun-915 1:1 Feedline Chokes are 1:1 ferrite chokes designed for inline use with 50-Ohm coaxial cable. Engineered to enhance performance in both stationary and portable Amateur Radio stations, it operates effectively from 1.8 to 30MHz and supports up to 500W PEP.
Not Yet Reviewed
$152.99
Chameleon Antenna Lightweight 4010 End Fed Halfwave Sloper
Chameleon Antenna Lightweight 4010 End Fed Halfwave Sloper is a four-band HF antenna for use on the 40-10 meter Amateur Radio bands without the need for a tuner and 30, 17, and 12 meters is possible with the help of a tuner. Near-Vertical Incident Skywave (NVIS) communication is possible, but dependent on the configuration of the antenna when installed. The CHA-LEFS-4010 is designed for the trail and its minimalistic design and lightweight components make this antenna ideal for backpackers, hikers, bikers, campers, and survival communication. The built-in line winder with its integral high-efficiency 49:1 impedance matching transformer and ultra-thin 20 AWG PTFE antenna wire enables extremely portable four-band operation without the extra bulk of an antenna tuner. With the addition of user supplied antenna wires that have been cut to length for the desired band of operation, two insulators and support rope, this CHA-LEFS-4010 antenna can be converted to a standard or inverted V dipole antenna. Elevate your portable operations with the exceptional performance and convenience of the CHA-LEFS-4010. This antenna system is available in 2 configurations consisting of the following components: CHA-LEFS-4010 - 1 X CHA LEFS 65ft. of 20AWG Tinned Copper PTFE wire - 1 X OD Carrying Pouch CHA-LEFS4010-316 - 1 X CHA LEFS 65ft. of 20AWG Tinned Copper PTFE wire - 1 X OD Carrying Pouch - 1 X 25ft. RG-316 Coaxial Cable with RFI Choke
( 3 )
$175.00
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$250.00