49 RF Chokes & Filters ISO-PLUS Ethernet RF Filter Give yourself another tool to help you pull out those weak signals and operate more ef ectively. DX Engineering has designed a simple way to suppress electromagnetic interference (EMI) and reduce common-mode RF interference (RFI) to and from Ethernet cables used between your personal computers, printers, routers, cable modems, transceivers and other devices. This interference is a common problem on Gigabit Ethernet Cat5e and Cat6 cables used for network LAN connections. The patent pending ISO-PLUS is an inline Ethernet filter that joins two RJ-45 connectors together to fight common-mode RFI and EMI noise interference for radio frequencies from well below 1 MHz to over 100 MHz. Installed on either end of Ethernet cables, ISO-PLUS filters mitigate RFI caused to the Ethernet-connected device. At the same time they reduce interference to radio receivers and other Ethernet devices that is caused by RFI or EMI generated by an Ethernet-connected device. The ISO-PLUS provides common mode attenuation resulting in reduced or eliminated EMI or RFI caused by power supplies, wall power adapters, touch lamps, appliances, and just about anything else near RJ-45 cables. The RF filters do not af ect Ethernet data signal levels or speed. Each ISO-PLUS comes with one shielded RJ-45 patch cable (about six inches). The filters work with Cat5, Cat5e, Cat6 and Cat6a cables with RJ-45 connectors. Available in sets of two or ten filters. The ISO-PLUS units do NOT pass DC voltages and do not support PoE (Power over Ethernet). DXE-ISO-PLUS-2 Ethernet RF Filter, 2 Units ....................................................$81.99 DXE-ISO-PLUS-10 Ethernet RF Filter, 10 Units ................................................$355.99 UNUNs The RU-1-1 1:1 UNUN helps remove unwanted RF from the coax cable shield. This 200W PEP common-mode RF choke is ideal for short coax cable runs or non-resonant antennas. The RU-1-1 features SO-239 sockets for both input and output. The RU-9-1 UNUN allows easy interface of vertical and end-fed antennas to the LDG line of automatic antenna tuners. This 200W PEP UNUN may also be used for many antenna projects where a 4:1 or 49:1 UNUN is needed. LDG-RU-1-1 1:1 UNUN, Coax Choke ......................................................... $29.99 LDG-RU-9-1 9:1 UNUN, Interface for Vertical and End-Fed Antennas ... $29.99 Baluns and UNUNs Built to benefit a range of antenna systems, Chameleon Baluns and UNUNs are designed to enhance impedance transformation and signal ef iciency while minimizing interference. Each unit features an FT-240-43 toroidal core precisely wound with PTFE-insulated, 14 AWG enameled copper wire; durable weatherproof housing; and top-mounted stainless steel eyebolt that provides a secure anchor point for base or portable operation. Check individual devices for antenna compatibility. CHA-UNUN-BALUN-1 1:1 Current Balun, 1-100 MHz, 50 Ω Input, 1,000W PEP ......................................................................$115.00 CHA-UNUN-BALUN-4 4:1 UNUN, 1-52 MHz, 200 Ω Input, 1,000W PEP ............$115.00 CHA-UNUN-BALUN-6 6:1 UNUN, 1.5-70 MHz, 300 Ω Input, 1,500W PEP .........$115.00 CHA-UNUN-BALUN-9 9:1 UNUN, 1.5-30 MHz, 450 Ω Input, 1,200W PEP .........$115.00 CHA-UNUN-BALUN-9 4:1 High Power UNUN for Non-Resonant Vertical Antennas Using non-resonant multi-band antennas? This UNUN helps your antenna system operate at maximum ef iciency by minimizing transmission line losses caused by SWR. You can add this UNUN to any 43 foot antenna system; it covers 1.8-30 MHz and can handle 2 kW CW/5 kW SSB. A feedpoint connection kit is available separately. DXE-UN-43 High Power 4:1 UNUN .....$201.99 DXE-UN-BRKT-5A UNUN Mounting Kit ........... $18.99 Wire Antenna Balun Mounting Bracket Kit for Maxi-Core® 20 Baluns Mounting your balun correctly is critical to maintaining its reliability. Here's the right solution to make sure your balun is ready to face Mother Nature—the Wire Antenna Balun Mounting Bracket Kit. To ensure proper balun operation, DX Engineering created this mounting kit designed specifically for single-band wire antenna setups. At the heart of each kit is a nearly indestructible mounting bracket made from a UV-resistant poly-resin compound. You’ll also get a pair of DX Engineering end insulators, along with all the stainless hardware required for installation. Its unique design provides minimum capacitive coupling between the antenna wire and the field surrounding the balun core. The DXE-WA-BMB is compatible with all Maxi-Core® 20 baluns and legacy Comtek baluns. DXE-WA-BMB Wire Antenna Balun Mounting Bracket Kit ..........................$29.99 CM7 Common-Mode Feedline Choke Made in the USA, this 50 Ω inline 1:1 common-mode feedline choke consists of seven mix-31 ferrite beads and 240 series (RG-8X) Ultra Flex coax with SO-239 Female and PL-259 Male connectors. Designed to solve some of the most common issues that can negatively impact antenna system tuning and performance, the CM7 provides 35-40 dB of attenuation from 1-300 MHz. Simply install the 18.25" CM7 at the feedpoint of your antenna and attach your existing coaxial cable to the opposite end. It can be used with many popular antenna types, such as EFHW, dipoles, random wires and verticals, to improve tuning consistency and antenna performance. REZ-CM7 Inline 1:1 Common-Mode Feedline Choke, 50 Ω, UHF Male to UHF Female .............................................$61.00 49:1 UNUN The BL-49 UNUN from CG Antenna is an outdoor HF antenna feedpoint transformer that's particularly suitable for building end-fed half-wave antennas. It is built with heavy-gauge wire and a large toroidal ferrite core which handles up to 600W PEP over the entire range from 1.8-30 MHz. Its waterproof case is made from high-strength plastic and features a valve to drain of condensation while preventing insects from getting inside. A stainless steel eye-hook at the top provides an attachment point for a support rope. Also on top is a stainless steel stud and wing nut for the antenna wire. A bottom-mounted SO-239 and a second wing nut allow the installation of an optional counterpoise wire or ground connection. CGA-11365-49 49:1 UNUN ...........................................................................$372.99 USB Isolator Surge Protection Device DX Engineering's USB Isolator (DXE-ISO-USB) is an inline solid-state device that provides surge protection between two USB 2.0 devices, typically a transceiver and a computer. It protects a transceiver from a voltage surge coming from the computer, and vice versa, protects a computer from a surge from a transceiver. A passive device that requires no power, the USB Isolator has two ports, one USB A and one USB B. It is bi-directional, so it can be installed in either direction. The supplied 19.7" USB A to USB B standard patch cable can be reversed and used for either type of equipment connection with the opposite connector to the mating port on the ISO-USB. A user-supplied cable must have the opposite mating connector for the ISO-USB, and its other end must have the USB connector type that provides connection to the second piece of equipment or computer. The device's maximum USB 2.0 speed is 480 Mbps. Backwards compatible with USB 1.0/1.1/12 or 480 Mbps. This supports RS-232 COM port data speeds faster than the 115,200 bps baud rate selection found in most USB capable equipment. The device does not support USB C GB/s data speeds and does not pass suf icient DC current for charging or powering a device. Enter "ISO-USB" at DXEngineering.com for more details. DXE-ISO-USB USB Isolator Surge Protection Device ................................$129.99 JBalun-915 1:1 Feedline Choke Designed for inline use with 50 Ω coax, the JBalun operates ef ectively from 1.8-30 MHz, handling up to 500W PEP. It features 6061 hard anodized aluminum housing and employs Mn-Zn ferrites. Choke is 6.7" long. NCE-CH0022512-M JBalun-915 1:1 Feedline Choke, SO-239 .............................$174.00 2M Current Balun Don't let unwanted currents flowing along your coax ruin your time on the air. Designed to keep common mode currents of your feedline for better antenna performance, this 50 Ω current balun from InnovAntenna features a ferrite core covered in a glue-filled UV-stable heat sink, plus power handling of 1.5 kW SSB/1.2W CW/1 kW Digital. Ring terminals allow for easy connection to the feedpoint of your antenna. IVA-18484-0501TB 1:1 144 MHz Current Balun Choke .......................................$119.99 HF/6M RFI Choke Made for easy installation, this choke prevents or reduces RFI carried into the shack by your coax. The TRF-MINI features a PL-259 connector on one end and an SO-239 on the other. The cable assembly includes a ferrite core at the center. At just 7" long, the choke should easily fit behind most radios. It can handle up to 350W and covers 1.8-54 MHz. CMA-TRF-MINI HF/6M RFI Choke .............$29.95 WARNING: For Proposition 65 information, see p. 3 Check out our YouTube channel for in-depth tech tips and product demos!
