DX Engineering has been named the exclusive distributor in the U.S. and Canada of the Sky Sat Group’s lineup of 4O3A band pass filters, headsets and communication accessories, and station automation device controllers.
In addition, DX Engineering and FlexRadio will share U.S./Canada distribution rights for 4O3A’s line of Genius devices: the Power Genius XL Amplifier, Tuner Genius XL Antenna Tuners, and Antenna Genius 8×2 Plus Antenna Switch.
Customers can now receive warranty support on 4O3A Genius products from DX Engineering’s qualified service partners in addition to FlexRadio’s current warranty service and technical support.
Based in Montenegro, the Sky Sat Group was founded in 1991 by noted amateur radio contester Ranko Boca, 4O3A. Named after his call sign, 4O3A is a division of the Sky Sat Group that focuses on creating products which eliminate station complexity, reduce costs, improve operator efficiency, and boost contest scores.
“DX Engineering is excited for the opportunity to continue to bring 4O3A’s high-quality, station-enhancing products to amateur radio operators in North America,” said Tim Duffy, K3LR, DX Engineering CEO. “We’ve fostered a valued relationship with their team since adding them to our list of manufacturers two years ago. This next step further builds upon this relationship while advancing our commitment to providing hams with the best equipment from around the world.”
4O3A-manufactured products sold exclusively in the U.S. and Canada through DX Engineering include:

Image/DX Engineering
- NC-1 Noise-Canceling Bluetooth Headphones/Boom Mic Headset, along with adapter cables, dongles, and wooden headphone stand
- XL Series High-Power 4,500W PEP Band Pass Filters, 160-6M, with Type-N female or SO-239 connectors
- Station automation device controllers including the Antenna A/B Switch Relay, 8-Antenna A/B Switches, Antenna Genius 8×1 Switch, 1A2R One Amp/Two Radio Switch, RS-3000 Coaxial Crossover Switch 2×2, and other products coming soon to DX Engineering
4O3A items will be added to DXEngineering.com as they become available. Please visit the website and DXE social media for updated information in the coming months.
About 4O3A Genius Products Available in the U.S. and Canada from DX Engineering and FlexRadio
- Power Genius XL Amplifier (PGXL): Offering clean legal-limit power at 100% ICAS duty cycles in all modes, the PGXL (1.8–54 MHz) is the only fully SO2R-capable amplifier on the market with 70 dB isolation between transceiver inputs. It can interface with any modern transceiver and seamlessly integrates with any FLEX-6000 Series transceiver.
- Tuner Genius XL Antenna Tuners (TGXL): Designed to complement the FLEX-6000 series transceivers and PGXL, these tuners cover 1.8–54 MHz up to 2,000 watts SSB/CW with a tuning range up to 10:1 SWR at reduced power. The automatic/manual tuner is available in a 1×3 configuration or SO2R (Single Operator/Two Radio) version.
- Antenna Genius 8×2 Plus Antenna Switch (AG): This switch accommodates up to eight antennas and two transceivers, making it an excellent choice for dual RX transceivers, SO2R, and multi-operator contesting stations.