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REZ Antenna Systems XFORM 4:1 Unun
SKU Part Number: REZ-SXF-41
The REZ Antenna Systems XFORM 4:1 Unun is a modular impedance-matching system designed for use with the REZ Scout antenna system. It expands the...
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Product Accessories

The REZ Antenna Systems XFORM 4:1 Unun is a modular impedance-matching system designed for use with the REZ Scout antenna system. It expands the Scout platform beyond traditional quarter-wave verticals and half-wave dipoles, giving portable operators more flexibility when building efficient HF antenna configurations in the field.

Designed to integrate directly with the Scout XF base, its 4:1 ratio provides impedance transformation between 50 ohms and 200 ohms, making it suitable for a range of portable wire and vertical antenna arrangements.

The XFORM system has been developed as a modular platform, with future 9:1 and 49:1 transformer modules planned to further expand Scout system configurations. When combined with additional modules and compatible accessories, the system is intended to support over 30 potential antenna deployment options.

Built for demanding portable use, the XFORM features CNC-machined 6061 aluminium, an acetal polymer body, stainless steel hardware and a gasket-sealed housing for outdoor weather resistance. Each core is precisely wound and tested for thermal stability and low insertion loss, helping provide efficient signal transfer and cooler operation under load.

Key Features

  • Modular 4:1 Unun for the REZ Scout system
  • Designed to expand Scout antenna configuration options
  • Integrates directly with the Scout XF base
  • 4:1 impedance transformation, 50 ohms to 200 ohms
  • Suitable for portable HF antenna systems
  • Designed to support future swappable transformer modules
  • Helps enable a wider range of antenna deployments
  • CNC-machined 6061 aluminium construction
  • Acetal polymer body
  • Stainless steel hardware
  • Gasket-sealed housing for outdoor use
  • Tested for thermal stability and low insertion loss
  • Rated for 200W PEP SSB and 75W digital

Specifications

  • SKU: REZ-SXF-41
  • Unun ratio: 4:1
  • Impedance transformation: 50 ohms to 200 ohms
  • Power handling: 200W PEP SSB
  • Digital power handling: 75W
  • Duty cycle: 50 percent
  • Length: 139.7mm (5.5 inches)
  • Maximum diameter: 63.5mm (2.5 inches)
  • Weight: Approximately 397g (14oz)
  • Construction: CNC-machined 6061 aluminium, acetal polymer body and stainless steel hardware
  • Weather resistance: Gasket-sealed housing
  • Compatibility: Requires a REZ Scout base
  • Scout XF compatibility: Direct integration

Important Note

The REZ-SXF-41 XFORM 4:1 Unun requires a REZ Scout base for use. The Scout XF base, antenna wires, whips, radials and other accessories are sold separately unless otherwise stated.

Shipping:

We have several shipping options for our products, including next-day and Saturday/Sunday delivery for certain items. Please see these options at checkout.

Returns:

If you have any equipment that needs to be returned to Martin Lynch & Sons, please fill out the form below:

Click here for returns form

Upon receipt of goods you have 14 days to return goods however the goods must be returned in original packaging and care must have been taken with the goods you wish to return. Under distance selling regulations you are not entitled to any refund on carriage charges or modification charges made at your request. Large items cannot be returned if they have been assembled, unless faulty.

Warranty Terms and Conditions

Outside of the 14 faulty return period, returned items cannot be accepted, unless covered by manufacturer's warranty. We will repair as much as possible on site however in exceptional circumstances products may have to be returned to the manufacturer of distributor.

For repairs/replacements under manufacturer’s warranty for any item please download a ML&S return form from the link above and return to ML&S with the faulty product.

International Warranty information

Warranty service for items we sell is available in the U.K. only, unless otherwise noted. It is your responsibility to pay freight for returned items to the U.K. and back to you for desired warranty coverage. All of our NEW products come with a minimum 12 month warranty, (Yaesu & Icom 24 months), with up to 90 days on second-hand equipment. Items returned for service must state "returned goods for repair" on the return air waybill or U.K. import customs duties apply and will be added to your invoice. For more info about returning items please contact our customer help desk, [email protected]