52 DX Engineering carries equipment from more than 175 top manufacturers! Balun or Feedline Choke Mounting Plate and Bracket Kit This kit provides a variety of mounting solutions for DX Engineering Maxi-Core 20, Comtek and other brands that use 4" x 4" x 2" plastic NEMA boxes. This rugged polymer plastic plate and stainless steel bracket kit may be used at the base of any vertical, on the boom of a Yagi or beam antenna, or even on a mast or post. This unique perpendicular mount provides a beneficial separation between the ferrite of the balun or choke and the metal tubing, resulting in improved choking performance. This UV black high-strength polymer mounting plate provides added isolation between the feedline and the antenna system for optimal performance and decoupling. The stainless steel mounting bracket is laser cut for optional heavy-duty DX Engineering V-Saddle Clamps. DXE-MC20K-BRKT Mounting Plate and Bracket for Maxi-Core 20 .....................$37.99 Choke and Mounting Packages Also available are packages which include both a Maxi-Core 20 choke and mount. Choose from the 1:1 current choke balun and vertical/beam mount package for 50 Ω feedpoint antennas or the 1:1 feedline choke and inline mount combo for 50 Ω coaxial feedlines. DXE-MC20-FCM 1:1 Feedline Choke and Inline Mount Package, 50 Ω ........$207.98 DXE-MC20-1-1BM 1:1 Balun, Mount Package for Verticals/Beams, 50 Ω .......$207.98 Balun Upgrade Kits Ready to take your Yagi, beam or rotatable dipole to the next level? These kits provide everything you need to take advantage of improved station performance: 1:1 DX Engineering Maxi-Core® 20 Balun, mounting bracket, hardware and clamps for your antenna update. Maxi-Core® 20 Baluns handle full-legal- power-plus and provide higher common mode impedance across a greater frequency range than competing models. These baluns exhibit very low insertion loss and inherently low SWR. Kits include: • DXE-MC20-1-1 Maxi-Core® 20 1:1 Current Choke Balun made for all HF-6M balanced antennas with a 50 Ω feedpoint, including resonant dipoles, loops, Yagis and beams • DXE-BMB-4P Balun Mounting Bracket designed for Maxi-Core® 20 baluns, with poly-resin plate and stainless steel hardware • DXE-BALUN-WK Balun Wiring Kit, which includes wire, terminal and hardware for antenna connection • DXE-ECLS-150 or DXE-ECLS-200 Stainless Mounting Clamp with Studs for antennas with 1.50" booms or masts or up to 2" booms or masts DXE-BN86-20UP150 Balun Upgrade Kit for 1.5" Boom or Mast .......................$222.96 DXE-BN86-20UP200 Balun Upgrade Kit for up to 2" Boom or Mast ................$223.46 DX Engineering Maxi-Core® 20 Baluns and Feedline Choke Get ready to make a significant upgrade to your station’s performance with the next generation of baluns and feedline choke from the team at DX Engineering. Years of R & D coupled with major advancements in test equipment and techniques combined with custom ferrite materials have allowed our engineers to design these devices, signaling a new era of RF performance across the 1.8 to 54 MHz frequency range. Maxi-Core 20 Baluns and Feedline Choke: • Reduce or eliminate currents on the outside of your feedline, allowing you to hear and to be heard much better • Perform at the highest levels of eff iciency in transmit or receive applications • Provide much higher common mode impedance (CMI) across a greater frequency range—AM Broadcast band and the HF/6M spectrum—compared to competing models and even previous DX Engineering and Comtek models (CMI is a measure of how well a balun or feedline choke reduces exterior RF currents traveling through it and on the outside of the coaxial cable) • Keep more RFI/BCI out of your antenna and receiver • Transfer more of your transmitted signal to the antenna for high eff iciency, the best antenna pattern, and maximum performance • Force currents on the feedline or antenna to be equal for maximum eff iciency and more symmetrical antenna patterns • Handle full-legal-power-plus • Feature 1/4-20 stainless steel hardware, a high-quality silver-plated PTFE dielectric SO-239 (UHF female) input connector, four weepholes to eliminate internal moisture, and weather-resistant NEMA enclosure with convenient mounting holes Hear and be heard with DX Engineering Maxi-Core 20 Baluns and Feedline Choke! Choose from 5 options: DXE-MC20-1-1, 1:1 Current Choke Balun For all HF-6M balanced antennas with a 50 Ω feedpoint, including resonant dipoles, loops, Yagis and beams. DXE-MC20-FC, 1:1 Feedline Choke Use this high CMI line isolator inline on 50 Ω feedlines, at the antenna, tower or shack end of the feedline. DXE-MC20-1-1T, 1:1 Current Choke Balun This 1:1 “T” model provides outdoor transition from any impedance balanced "ladder" line to coaxial cable and a wide impedance range tuner. Made for high-SWR non-resonant multiband antenna systems to force currents equal on the balanced line to minimize radiation and RFI, and maximize antenna performance. DXE-MC20-C4-1,. 4:1 Current Choke Balun For use on antennas with a 200 Ω feedpoint and on any impedance ladder line, especially antenna systems with higher impedance. This model tolerates operation at high SWR on non-resonant multi-band antennas. DXE-MC20-V4-1, 4:1 Voltage Balun Use this 200 Ω to 50 Ω transformer on random long-wire and OCF antennas. This true voltage balun tolerates high SWR and is intentionally designed with low CMI for antennas that need a transformer without RF choking for easier tuner operation. Enter “DXE Maxi” at DXEngineering.com for complete details. DXE-MC20-1-1 Maxi-Core 20 High CMI 1:1 Current Choke Balun ...............$169.99 DXE-MC20-FC Maxi-Core 20 High CMI 1:1 Feedline Choke, Line Isolator ......$169.99 DXE-MC20-1-1T Maxi-Core 20 High CMI 1:1 Current Choke Balun, Tuner Model ..........................................................................$147.99 DXE-MC20-C4-1 Maxi-Core 20 High CMI 4:1 Current Choke Balun ...............$169.99 DXE-MC20-V4-1 Maxi-Core 20 Low CMI 4:1 Voltage Balun ............................$141.99 DXE-MC20-V4-1 DXE-MC20-FC Cable Strain Relief Brackets Mounting your balun or choke is only part of the equation— you still need to make sure your coaxial cables are secure and free from the stress of gravity. Our Cable Strain Relief Brackets will help prevent the cable from pulling from your PL-259 connector. DXE-CSR8X-1 Cable Strain Relief Assembly, for RG-8X Cable .................. $26.99 DXE-CSR213-1 Cable Strain Relief Assembly, for RG-213/U Cable ............ $26.99 DXE-CSR213-1 Baluns & Ladder Line 300 and 450 Ω Ladder Line DX Engineering’s 300 and 450 Ω Ladder Line is a transmitting-grade low-loss parallel-wire RF feedline featuring a strong, waterproof, UV black polyethylene insulation. The 300 Ω ladder line is constructed of 18-gauge conductors with 19 strands of copper clad steel wire, resulting in a velocity factor of 0.88. It is ideal for use with multi-band dipoles or other multi-band antennas. The 450 Ω ladder line is constructed of 16-gauge conductors with 19 strands of copper clad steel wire, ideal for use with our Reversible Beverage Antenna, DXE-RBS-1P. The wire makes the line strong enough for long horizontal runs between supports. Actual impedance is a nominal 400 Ω with a nominal velocity factor of 91%. DXE-LL300 300 Ω Ladder Line ......................................................per foot $0.77 DXE-LL300-5C 300 Ω Ladder Line, 500' Spool ........................................... $281.99 DXE-LL450-5C 450 Ω Ladder Line, 500' Spool ........................................... $385.99 DXE-LL450 450 Ω Ladder Line ......................................................per foot $1.18 DXE-LL450-1K 450 Ω Ladder Line, 1,000' Spool ........................................ $792.99 DXE-LL-INS Ladder Line Supports for 450 Ω line, 25 Per Pack ...............$22.49 DXE-LLC-1P Ladder Line Coupler for 450 and 300 Ω Ladder Line ..........$11.99 DXE-LLC-1P DXE-LL300 Feedpoint Connectors These connectors provide a direct transition from cable to feedpoint for a variety of antennas that do not have a coaxial connector. They feature two 4" or 11" silver-soldered solid tinned-copper 12 AWG wire leads which are epoxy potted into a plastic housing for a weather-sealed connection. DXE-FFPC-SO239 SO-239, 4" Leads, Flanged ....................................................$46.99 DXE-FFPC-SO239ZD SO-239, 11" Leads, Flanged ..................................................$55.99 DXE-FPC-716DIN 7-16 DIN Female, 4" Leads ....................................................$86.99 DXE-FFPC-N N Female, 4" Leads, Flanged.................................................$53.99 DXE-FFPM Feedpoint Connector Mounting Bracket Kit ........................$14.49 DXE-FFPC-SO239 DXE-FFPM
