Availability
REZ Antenna Systems Baluns, UNUNs and Chokes
REZ Antenna Systems CM7 Common Mode Feedline Chokes
REZ Antenna Systems CM7 Common Mode Feedline Chokes are inline 1:1 common mode feedline chokes, consisting of seven mix-31 ferrite beads and RG223/U double shield coax. Proudly made in the USA, the compact and streamlined CM7 was designed to solve some of the most common issues that can negatively impact antenna system tuning and performance. For instance, common mode current carried on the outside of a coaxial cable can cause unwanted RF traveling back to your operating position, causing many issues. Another common issue is that the coax will become part of the antenna system and begin radiating RF. In most cases this is undesirable. Simply install the CM7 at the feed point of your antenna and attach your exiting coaxial cable to the opposite end. The CM7 can be used with many popular antenna types, such as EFHW, dipoles, random wires and verticals, to improve tuning consistency and antenna performance. Many antennas require the use of a 1:1 choke to isolate the coaxial cable from the antenna system for proper performance. Why not improve the performance of your antenna system? Order a REZ Antenna Systems CM7 Common Mode Choke from DX Engineering.
( 13 )
$69.99
REZ Antenna Systems XFORM 4:1 UNUN
The REZ Antenna Systems XFORM 4:1 UNUN is a modular impedance-matching system designed for the Scout system, expanding its capabilities beyond traditional quarter-wave verticals and half-wave dipoles. It integrates seamlessly with the Scout XF base and supports legacy Scout bases via a jumper connection. The XFORM enables over 30 potential antenna deployment options when combined with future 9:1 and 49:1 transformer modules, which are currently in development. Built for durability, the XFORM features CNC-machined 6061 aluminum, an acetal polymer body, and stainless steel hardware. Its gasket-sealed design ensures reliable performance in harsh weather conditions. The unit handles up to 200 watts PEP SSB and 75 watts digital (50% duty cycle) and measures 5.5 inches in length with a maximum diameter of 2.5 inches. Each core is precisely wound and tested for thermal stability and minimal insertion loss, delivering efficient signal transfer and cooler operation underload. The XFORM requires a Scout base for use, making it an essential upgrade for operators seeking maximum versatility and performance in portable HF antenna systems.
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$189.95