FlexRadio Aurora 520 500W HF Transceiver
Introducing the Aurora™ Series—an all-new family of HF/6m transceivers featuring the world’s first truly integrated 500W
SDR transmitter. The Aurora Series defines a new category in amateur radio, eliminating the traditional boundaries between transceiver, amplifier, tuner, and power supply.
Designed for the modern operator, the Aurora Series delivers exceptional RF performance in a radically compact form
factor—leveraging cutting-edge high-efficiency technology that produces more power with less weight, lower heat,
and dramatically reduced power input requirements.
At the heart of Aurora is a revolutionary 500W transmitter module that achieves up to 90% efficiency—a dramatic
leap over conventional MOSFET and LDMOS designs, which typically operate at 40–60%. The result: less heat
to dissipate, a smaller heatsink, and a much lighter radio.
The entire 500W transmitter fits in the same physical envelope as traditional 100W PA systems and runs cool
enough to share the existing FLEX-8000 heatsink footprint. This level of integration means operators no longer need
to carry or connect external power amplifiers, tuners, or heavy AC/DC power supplies. The Aurora Series
includes everything needed inside the chassis—power supply, automatic antenna tuner, and 500W transmitter—
with a standard IEC plug accepting 80–264VAC.
The AU-510M / AU-520M allows the same client access, but does so with a stunning 8” touchscreen display
and ergonomic controls to deliver a high-performance SDR with a traditional radio interface—no PC required.
Both models share the same AURORA high-power,highefficiency transmitter, game-changing band awareness,
industry-leading phase noise performance / receiver dynamic range, and brick wall filters to give you the
advantage in the most competitive DXing or contesting activities while maximizing your fun during casual
operations.
Specifications:
• 500W PEP HF, 200W 6m operation with 80% nominal efficiency
• Integrated AC/DC Power Supply, 80-264VAC, 47-63Hz, PF > 0.94
• All Modes/Amateur Bands 160m-6m
• Integrated Remote Operation with a Maestro™, iPad®, iPhone® or PC/Laptop
• Four Independent Band/Mode Receivers
• Full Duplex Cross-Band Operation
• True Diversity Reception
• Two Receive Only Ports
• Two Transverter/Exciter Ports
• Integrated SO2R Solution (OTRSP) Support in one radio
• Contest Band Filters: >50dB Rejection band-to-band
• Direct Sampling SDR 245.76Msps, 16 bit
• 115 dB 2kHz RMDR
• 8-Inch 1920 X 1200 IPS Display on AU-520M with external monitor port
• >155 dB Dynamic Range
• Built in 500W Antenna Tuner
• 10 MHz Reference Input
• Integrated GNSS receiver with antenna maintains radio frequency with no adjustments
• Optional High-performance GPSDO provides 10MHz output for external equipment
Available in Q5 2025 with 100% deposit on order, or with $1500 deposit, radio will be available late Q1, 2026.
