FLEXRADIO FLEX-8400 ATU
SDR Power and Integrated Tuning
The Evolution of the Modern SDR Station
The FlexRadio FLEX-8400 ATU represents the ideal technological heart for those seeking top-tier performance in an optimized "black box" format. This version eliminates the need for bulky physical interfaces, entrusting total control to the award-winning SmartSDR ecosystem.
Thanks to its new-generation direct sampling architecture, it offers spectral purity and receiver dynamics that redefine standards. The integrated automatic tuner (ATU) ensures perfect antenna matching in milliseconds across all HF and 6-meter bands.
Why choose the ATU version?
● REMOTE OPERATION
Essential for managing remote band changes via SmartLink without worrying about SWR, protecting the radio's finals.
● DIGITAL MODES & FT8
Zero cabling. Utilizes two independent Slice RX to monitor different bands and maximize QSOs in contests.
● APD SIGNAL
Adaptive Pre-distortion technology cleans the transmitted signal, offering unparalleled linearity.
DETAILED TECHNICAL SPECIFICATIONS
| Receivers (Slice RX) | 2 independent receivers |
| Architecture | 16-bit Direct Sampling |
| Dynamic Range (RMDR) | 115 dB |
| Output Power | 1-100W PEP HF/6m |
| Tuner (ATU) | INCLUDED AS STANDARD |
| GPS/GNSS | Integrated as standard |
FLEXRADIO 2026 RANGE COMPARISON
| MODEL | POWER | SLICE RX | DISPLAY | TUNER (ATU) |
|---|---|---|---|---|
| AU-510 / 510M | 500W | 2 | No / 8" Touch | STANDARD |
| AU-520 / 520M | 500W | 4 | No / 8" Touch | STANDARD |
| FLEX-8400 | 100W | 2 | No | NO |
| FLEX-8400 ATU | 100W | 2 | NO | ✔ STANDARD |
| FLEX-8400M | 100W | 2 | 8" Touch | NO |
| FLEX-8400M ATU | 100W | 2 | 8" Touch | STANDARD |
| FLEX-8600 | 100W | 4 |
