Availability
Baluns, Ununs and RF Chokes
LDG Electronics RU-1:1 Unun
LDG Electronics RU-1:1 Unun is intended to help remove unwanted RF from the coax cable shield. It is normally used as a common-mode RF choke for short coax cable runs or non-resonant antennas. The RU-1:1 features SO-239s for input and output. RU-1:1 Unun Specs: * Ratio: 1:1 * Frequency coverage: 1.8 to 30 MHz. * Power range: Up to 200 watts PEP * Enclosure dimensions (WHD): 2.5 x 5 x 1.25 in. * Weight: 6 oz.
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$39.99
LDG Electronics RU-4:1 200 Watt UNUNs
These LDG RU-4:1 200 Watt UNUNs were designed to allow for an easy interface of 43 ft., non-resonant vertical antennas to antenna tuners via 50-ohm coaxial cable. These 200 watt peak-power UNUNs also allow for the easy matching of resonant verticals--in many cases, without the use of an antenna tuner! They may also be used with many of your antenna projects where a 4:1 match is needed. When you are looking for an inexpensive solution to your antenna matching needs, these LDG RU-4:1 200 Watt UNUNs from DX Engineering are real matchmakers!
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$39.99
DX Engineering LPFC-BNC Low Power Feedline Chokes
DX Engineering LPFC-BNC Low Power Feedline Chokes are intended to be placed in line with coaxial cable fed antennas and equipment used for portable operations, including POTA and SOTA activations. The DXE-LPFC-BNC coax wound toroid achieves an amazing common mode impedance (CMI) curve, with an RF choking capability that far exceeds the CMI of 'a-few-beads-on-coax' product that is offered by other suppliers. Actually, these "Low Power" Feedline Chokes can be used in any station that runs less than 250 watts SSB, 100 watts CW or Digital. ________________________________________ DX Engineering Low Power Feedline Chokes features and benefits: - A unique, lightweight form, with clear heat shrink over the choke* - Light enough to hang inline at the feedpoint of any portable HF antenna. - BNC female connectors for easy connection to portable antennas and gear. - Much higher CMI that other portable, low power chokes, especially across the 40 through 6 meter bands. - Frequency range of 1.8 through 54MHz. - RF Power Handling up to 250 watts PEP SSB, 100 watts CW and Digital (at SWR <2:1). - Recommended for general use to isolate either end of a coaxial cable. * Not intended for permanent outdoor use unless mounted inside a weatherproof enclosure. ________________________________________ These chokes are ideal for use at any HF transceiver or receiver antenna connection, portable, mobile or base. In most cases, DXE-LPFC-BNC prevents RFI, stops stray RF and noise on the feedline from getting into the receiver that would cover up weak signals, and improves efficiency of the antenna system. For any station, including POTA and SOTA, mobile and base, DX Engineering Low Power Feedline Chokes keep the RF controlled.
Not Yet Reviewed
$59.99
DX Engineering Wire Antenna Balun Mounting Brackets
DX Engineering Wire Antenna Balun Mounting Bracket Kits are custom designed specifically for mounting high-performance Maxi-Core® 20 Baluns or legacy Comtek baluns. These kits include the virtually unbreakable combination balun mounting frame and wire antenna center insulator bracket, two DX Engineering End Insulators plus all stainless steel hardware. This unique design provides minimum capacitive coupling between the antenna wire and the field surrounding the balun core. Wire Antenna Balun Mounting Bracket Kits are the ideal starting point for building a top-performing and long-lasting coaxial cable fed single-band or multi-band wire antennas. Use a DX Engineering Maxi-Core® 20 Balun or Comtek balun, or other manufacturer's similar NEMA box balun, for a resonant or off-center fed dipole, inverted-V or loop. Use the optional coaxial cable strain relief (DXE-CSR213-1 for RG-213 or RG-8U sized coax or the DXE-CSR8X-1 for RG-8X sized coax) with your optional dipole wire (DXE-ANTW Antenna Wire) and antenna rope, all from DX Engineering. These patented** balun wire antenna insulator brackets and end insulators are made from a super high-strength UV resistant black poly-resin compound. They provide an exclusive serpentine wire-weave grip for insulated antenna wire. This method of threading the wire provides a grip strong enough to permanently support the antenna wires without the need for soldered wrapped wire ends onto the antenna wires. This allows fast and easy field adjustments of antenna length for tuning without soldering. Get everything you need to build the best performing, longest lasting wire antenna possible, all from DX Engineering! DX Engineering Wire Antenna Balun Mounting Bracket Kits DXE-WA-BMB: 1 ea. Balun & Wire Antenna bracket High-strength UV black poly-resin (** US Patent # D744,459) 2 ea. DX Engineering End Insulators High-strength, UV poly-resin (**US Patent # D534,905) 4 ea. 6-32 x 3/4" long Stainless Steel Hex Head Bolts 8 ea. #6 Stainless Steel Flat Washers 4 ea. 6-32 Nyloc Hex Nuts Click "More Detail" to see the "Documentation" tab for additional product information and the "Suggested Parts" tab for the additional items (not supplied) for your resonant wire antenna project with the DX Engineering Wire Antenna Balun Mounting Bracket Kit.
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$29.99
Comet Antennas HF/6M RFI Chokes
Comet Antennas HF/6M RFI Chokes are designed to be easy to install and will help prevent or reduce RFI carried into the shack by the coax. The TRF-Mini features a PL-259 connector on one end and an SO-239 on the other, this cable assembly includes a ferrite core at the center. At just 7 inches long, there is sure to be room behind your radio for this choke that can handle up to 350 watts and covers from 1.8-54 MHz.
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$29.95
DX Engineering Maxi-Core® 20 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
CG Antennas BL-49 Unun
CG Antennas BL-49 Unun, also referred to as a 49:1 Balun, is an outdoor HF antenna feedpoint transformer. This high ratio device is particularly suitable for building an End Fed Half Wave, or EFHW antenna. Available as part number CGA-11365-49 from DX Engineering, this 49:1 Unun is built with heavy gauge wire and a large toroidal ferrite core which handles up to 600W PEP over the entire range from 1.8 to 30 MHz. The waterproof case is high strength plastic with a special valve to drain off unavoidable condensation while preventing insects from entering and nesting. A stainless steel eye hook at the top of the Unun provides an attachment point for a support rope to handle the weight of the Unun, antenna wire, and coax. Also on top is a stainless steel stud and wing nut for the antenna wire and another is on the bottom, next to a SO-239, for an optional counterpoise wire or ground connection. End-fed half-wave antennas (EFHW) are very popular because they are easy to hang in limited space installations while achieving multi-band functionality with a transceiver built-in tuner or an external wide range tuner. In many cases the use of a BL-49 Unun with a specific monoband wire length can achieve low or reasonable SWR on many harmonically related Amateur bands. The radiation pattern of an EFHW antenna is similar to that of a dipole and the 49:1 Unun adapts to different end-fed wire configurations; the antenna wire may be suspended straight and parallel to the ground, or angled as an inverted-V or inverted-L, or run diagonally as a sloper wire, with the BL-49 Unun feedpoint located anywhere from a few feet above the ground hanging high from a support. Experimentation is encouraged with this very adaptable and forgiving feedpoint method, where the position of the wire in relation to the ground or any metal having the greatest effect on the efficiency and the pattern of the EFHW wire antenna. See antenna texts and web forums for wire lengths known to provide the best results, such as 60-70 ft. for 80-10 meters. CG Antennas BL-49 Unun Specifications: Frequency Range: 1.8 - 30 MHz, antenna tuner required. Transformer Ratio: 49:1 Feedline Impedance (Ω): 50 Ohm Max. Power: 600W SSB Connector: SO-239 – UHF female Size (WHD): 3.582 x 5.984 x 2.165 in. (91 x 152 x 55 mm) Weight : 1.15 lbs. (520 g)
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$335.99
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
The Radio Source TheMATCHBOX Broadband Matching Transformer
The Radio Source TheMATCHBOX Broadband Matching Transformer is a multi-tap transmission-line transformer designed to raise the inherently low feed-point impedance of electrically short end-fed antennas to a value suitable for direct connection to 50-ohm coaxial cable. Unlike conventional transformers that provide optimal performance primarily above 1 MHz, TheMATCHBOX delivers efficient operation down to 100 kHz using a manganese-zinc (MnZn) toroid core, minimizing loss while maintaining a low standing wave ratio. Because the feed-point impedance of electrically short end-fed antennas is influenced by antenna length, ground conductivity, and ground system quality, TheMATCHBOX is field-configurable with eight impedance transformation ratios. This flexibility allows it to match antennas with feed-point impedances ranging from 3 to 37 ohms to a standard 50-ohm coaxial feed line. Designed for permanent outdoor installation, TheMATCHBOX is housed in a rugged, weatherproof aluminum enclosure that mounts directly at the antenna feed point. Integrated top and bottom mounting flanges allow for secure attachment to a wide variety of support structures, providing a durable and reliable solution for LF and MF antenna systems
Not Yet Reviewed
$595.00
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
Chameleon Antenna Baluns UNUNs and Chokes
Chameleon Antenna Baluns UNUNs and Chokes are available in a variety of ratios that include 1:1, 4:1, 6:1 and 9:1 and they are compatible with an array of antennas and systems. These Baluns and UNUNs will enhance impedance transformation and signal efficiency while minimizing unwanted interference. The FT240-43 toroidal cores are precisely wound with PTFE-insulated, 14AWG enameled copper wire and assembled in a durable, weatherproof housing that's suitable for even the most adverse weather conditions. The top mounted stainless steel eyebolt provides a secure anchor point for base or portable operation.
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$115.00
DX Engineering TWIG QRP 4:1 Current Baluns
The DXE-TWIG-4-1C QRP Current Balun is designed to be used as the feedpoint of a very low power (QRP) Off Center Fed dipole (OCF) antenna. Ideal for use during outdoor adventures such as POTA® or SOTATM, or any portable operation. The TWIG-4-1C incorporates a 4:1 transformer to convert the OCF antenna impedance of 200-ohms to the desired 50-ohms to match the coaxial cable feedline. It also has a 1:1 feedline choke, to prevent current imbalance, detuning, and to help prevent the addition of unwanted noise. The connector is a BNC female and mates with the recommended coax and most low power (QRP) transceivers. When properly installed and the element wire is properly tuned, you should not need an external tuner. This reduces the need to bring more equipment than is necessary or a portable operation and provides higher efficiency of your output signal and instant band changes. The antenna shown in this manual was designed and tested using the optional 24 AWG wire such as CEW-VIZ24-YEL100 stranded copper, PVC insulated, high visibility yellow antenna wire. The BNC connectors coax cable is recommended to be at least 25 to 35 feet in length. The antenna can be installed in different configurations of wire lengths for various band selections. For example, a very common TWIG QRP OCF for 40, 20, 15 and 10 meters has one 57 ft. dipole wire and the other wire is 12 ft. See the chart in the Instruction Manual linked below for details. This is a low power (QRP) antenna system balun which handles only 25 Watts on SSB, 10 Watts on CW and 5 Watts on digital mode when antenna SWR less than 2:1, without the use of an antenna tuner.
Not Yet Reviewed
$69.99
Elecraft BL2 Switchable Balun Kit
Redesigned for higher power operation, Elecraft's BL2 Switchable Balun Kit provides two ratios, 4:1 and 1:1, with high efficiency, simplicity, and durability in a compact package. The kits are versatile and compact enough for a variety of matching applications. Shipped as an unassembled kit for custom builds and custom enclosures. Elecraft BL2 features and specs include: * 500 kHz to 55 MHz functionality * Rated to 250 W PEP, 100 watts CW * Rugged slide switch for switchable ratios * Compact size: 1.5 in. wide and 3.0 in. long * Lightweight * Screw terminals for balanced output and ground * Unique winding results in SWR of less than 1.2:1
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$76.95
EAntenna Replacement Baluns
Need to get your Delta antenna back online? EAntenna's Replacement Baluns are your answer. They're manufactured from the same quality materials to the same specifications as the original. Direct replacements for specific models and variations are available; please confirm application before ordering. Restore your antenna to full capacity with EAntenna's Replacement Baluns!
Not Yet Reviewed
$85.99
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$164.99
Momobeam RFC-DU 5kW RF Choke Baluns
Momobeam RFC-DU 5kW RF Choke Baluns provide an excellent balance of currents and ensure a proper transition between balanced resonant antenna systems (with low SWR)—such as dipoles and Yagi antennas—and unbalanced coaxial feedlines. These RF Chokes are highly effective at suppressing common mode current from flowing along the exterior of coaxial feedlines, a condition that can cause several issues, including: - Increased noise levels - Inaccurate SWR meter readings - Interference affecting electronic devices within our shack or near the antenna system
Not Yet Reviewed
$265.99
DX Engineering Bead Choke Standoff Kits
DX Engineering Bead Choke Standoff Kits bring a practical solution to a serious problem when ferrite chokes are placed directly onto the metal boom at the feedpoint of beam antennas. A number of Amateur Radio operators and antenna engineers have known for years about the superior choking function of many ferrite toroids beads placed directly on the coaxial cable, as compared to standard feedpoint baluns. A more recent revelation is that the proximity of ferrite beads on coax taped to the aluminum boom of the antenna drastically reduces their effectiveness. DX Engineering Bead Choke Standoff Kits are mounting systems, made of fiberglass or acetyl standoff rods (color varies), PVC carriers and stainless steel hardware, available in four versions. Two sizes of PVC cradle tubes handle two different types of RF bead chokes; 3/4 inch outside diameter (OD) ferrite beads on RG-400 size cable, and 1 inch OD ferrite beads on RG-213 size 0.405 in. coax cable. Each are offered with two different boom size clamps, 2 inch OD and 3 inch OD. Bead Choke Standoff Kits simply hold an RF bead choke and feedline 4 inches away from the metal beam antenna boom (or 4 inches away from the metal mast for a dipole). They maintain the optimal choking performance of ferrite beads on coax. Using DX Engineering Bead Choke Standoff Kits, ferrite bead chokes function at peak performance for these key results: • Prevent feedline radiation of RF • Preserve current balance for proper beam antenna pattern • Prevent feedline shield exterior collected noise and signals from entering the antenna and interior of the feedline, resulting in lower noise floor and enhanced reception The absolute superiority of RF chokes made of many beads on the feedline, over the traditional enclosure balun, is becoming better understood in Amateur Radio. They achieve the best possible RF isolation of the feedline from the antenna and provide completely balanced currents at the feedpoint. Plus, they provide quieter reception with reduction of common-mode noise. Keeping Bead RF Chokes away from metal preserves the optimal function of this method of antenna feedpoint current balance and isolation. This mechanical requirement is simple and practical with DX Engineering Bead Choke Standoff Kits.
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$52.79
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$65.99
Clearance
COMTEK Jerry Sevick W2FMI Series Current Baluns
COMTEK Jerry Sevick W2FMI Series Current Baluns were inspired by the writing of Jerry Sevick, as published in his book "Understanding, Building, and Using Baluns and Ununs" also available from DX Engineering. COMTEK baluns are value-engineered for maximum performance at a reasonable cost. They provide a superb, efficient transition between unbalanced coax and balanced antennas. COMTEK Baluns feature: * Jerry Sevick design with modern improvements from DX Engineering's in-depth balun research and development * Unique high-voltage compensating capacitors for unequaled SWR bandwidth * Outstanding ferrite-mix coated toroid core with special design to accommodate close coupling without excessive stress * Exceptionally high and consistent common mode impedance across the specified bandwidth, which provides isolation where it is needed most * Special wire size selection and Teflon-insulated wire sleeves provide exact impedance matching and superb insulation, unlike common Thermaleze wire * Typical insertion loss is less than 0.2 dB * Power handling on HF is 3 kW CW and 5 kW SSB on single core models, 5 kW CW and 7 kW SSB on dual core models * May be used to 54 MHz with reduced ratings * Gasketed SO-239 connectors are silver plated and have Teflon insulation * Sealed in a weatherproof 4 in. x 4 in. x 2 in. NEMA box * Stainless steel hardware Note: Polarity markings on baluns are used for matching phase on balanced antennas when stacking beams for a phased array. Also, the positive terminal should be connected to a vertical element or Inverted-L and the negative terminal goes to the radials. For most regular applications on one antenna, including beams, dipoles and most wire antennas, balun polarity doesn't matter. The best Amateur Radio baluns in the world are from DX Engineering. That includes COMTEK Jerry Sevick W2FMI Series Current Baluns!
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$104.99
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$129.99
$68.24
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$84.49
DX Engineering Dual Impedance Antenna Transformers
DX Engineering Dual Impedance Antenna Transformers are dual ratio UNUN (unbalanced to unbalanced line) transformers. They're great for coupling your 50 ohm coax to an antenna with a feed point impedance of either 25 or 12.5 ohms, typically found at HF mobile antennas. DX Engineering Dual Impedance Antenna Transformers are ideal for antennas that have been enhanced with a Hot Rodz capacity hat. These transformers are housed in an aluminum enclosure and use silver plated PTFE SO-239 connectors. Many mobile HF antennas are naturally between 10 ohms and 36 ohms at resonance. With 10 ohms at a 50 ohm feed point the resulting SWR is 5:1! Likewise, 36 ohms yields a 1.4:1 SWR. Matching at 1.4:1 isn't too bad, but 5:1 is definitely an issue. DX Engineering MM-1 Dual Impedance Antenna Transformers are ideal for adjusting the impedance mismatch in your HF mobile! When the natural resonant impedance of the antenna is at 30 ohms or below, the MM-1 mobile unun can provide the needed match. With a 50 ohm input, it provides a 25 ohm port and a 12.5 ohm port to facilitate mobile HF matching. Let's say that your antenna analyzer indicates a resonant antenna impedance of 22 ohms. Your SWR without an MM-1 would be 50/22 or 2.27:1. That's enough to cause considerable power rollback in most modern HF rigs. Using the MM-1 25 ohm port, your SWR would be 25/22, or 1.14:1. That's a very significant improvement! Many hams are using antenna analyzers to adjust mobile HF antennas. When a mismatch is indicated at resonance, a DX Engineering MM-1 Unun can solve the problem! Power handling capability depends on the match: * Using the 25 ohm to 50 ohm port, with SWR below 2:1 on the 50 ohm side, -- 750 watts PEP * Using the 12.5 ohm to 50 ohm port, with SWR below 2:1 on the 50 ohm side, -- 500 watts PEP Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. Antenna analyzers are becoming more common. Buy or borrow one to check the impedance of your mobile antennas. Then get DX Engineering Dual Impedance Antenna Transformers to get the best match and highest efficiency you can!
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$184.99
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-SC Single Core 1kW RF Choke Baluns
Momobeam RFC SC Single Core 1 kW RF Choke Baluns are efficient broadband common mode current (CMC) 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 CMC 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 SC effectively prevents these issues by stopping CMC from traveling on the outside of the coaxial shield, ensuring cleaner transmit and receive performance under all operating conditions. Thanks to its broadband characteristics, the RFC SC can be used with virtually any 50 ohm feed antenna system. It is ideal for Yagi antennas, resonant dipoles, and any installation where clean feedline behavior is essential. The choke also serves as an excellent replacement for damaged or aging 1:1 RF chokes or baluns, offering improved suppression and modern build quality. With robust performance, wide compatibility, and reliable common mode current elimination, the Momobeam RFC SC Single Core 1 kW RF Chokes provide a simple yet essential upgrade for ensuring your antenna system operates at its best.
Not Yet Reviewed
$144.99
DX Engineering Replacement Ceramic Insulators
DX Engineering replacement ceramic insulators are designed for use with DX Engineering baluns. They are manufactured from quality materials and include one gasket for installation. These through-panel ceramic replacement insulators have a diameter of 1.250 in. and are 0.813 in. tall without the metal hardware (not included). They are also very suitable for homebrew projects and as replacements in special applications such as vintage transmitters or trans-matches. For the best in porcelain insulators, DX Engineering Replacement Ceramic Insulators are the ones to use!
Not Yet Reviewed
$23.99
Momobeam Choke/Balun Mounting Brackets
Momobeam Choke/Balun Mounting Brackets enable the installation of Momobeam RF chokes on all compatible square and round Momobeam antenna booms. Constructed from durable, UV resistant ASA material, these brackets ensure long term reliability. Each package includes two properly sized plastic cable ties for secure choke attachment.
Not Yet Reviewed
$49.99
DX Engineering Balun and Feedline Current Choke Mounting Kits
DX Engineering Balun and Feedline Current Choke Mounting Kits allow you to mount a legacy "metal case" DX Engineering balun or feedline current choke at the base of any vertical antenna. This original mounting plate is not drilled for the Maxi-Core 20 Baluns and Feedline Chokes released in February 2020. Please see DXE-MC20K-BRKT to mount the plastic NEMA box models. For the older metal case models, this polymer mounting plate is isolated from the rest of the vertical ground system for best performance and decoupling. The mounting brackets were designed to utilize DX Engineering's V-bolt DXE-CAVS-1P saddle clamps, to mount the bracket onto a 1/2 to 1-3/4 in. ground pipe which mounts the balun or choke horizontally. Also available are the heavy duty DXE-CAVS-11P for 1/2 to 1-3/4 in. aluminum pipe and DXE-SSVC-2P for 1 to 2 in. steel pipe. V-bolt saddle clamps are not included and will need to be purchased separately if you choose to mount your bracket to a ground pipe. If you are mounting to a 4x4 or 6x6 wooden post, then no clamps are necessary--simply use 2 suitable wood screws. These kits work with any DX Engineering balun or choke with a formed-aluminum enclosure. Each kit includes a polymer mounting plate, aluminum adapter brackets, and stainless steel mounting hardware. Mounting clamps are sold separately. Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. This is the legacy DX Engineering Balun and Feedline Current Choke Mounting Kits for the metal case baluns and feedline current chokes.
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$28.99
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