Aurora AU-520M

FlexRadio Systems
SKU: AURORA-520M
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$9,599.00

MSRP:

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AU-520M Dual-SCU 500W Integrated SDR Transceiver with Maestro Front Panel

The AU-520M combines the power of a high-performance dual-SCU SDR with the convenience of an integrated Maestro™ front panel—offering unmatched versatility for operators who demand both flexibility and control.

Inside its compact chassis, the AU-520M integrates a full-featured software-defined transceiver, a high-efficiency 500W amplifier, an automatic antenna tuner, and a wide-range AC power supply—delivering serious performance without the need for external components.

At its core is a state-of-the-art transmitter module capable of up to 500W PEP at up to 90% efficiency, significantly reducing heat, power consumption, and physical size. The built-in Maestro front panel gives you instant touchscreen access, with responsive knobs and buttons for an intuitive, stand-alone operating experience—no PC required.

The AU-520M features two independent SCUs (Spectral Capture Units), each capable of simultaneously digitizing wide portions of the spectrum. This allows for up to 4 slice receivers and 4 independent panadapters, giving you true multi-band visibility and operation—covering 30 kHz to 54 MHz in real time.

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View Au-520M without integrated display

Inside the AU-520M:

  • 500W high-efficiency transmitter
  • Integrated AC power supply (80–264VAC)
  • Automatic antenna tuner
  • SmartSignal™ adaptive predistortion for cleaner signals and improved IMD performance
  • Controlled Envelope SSB (CESSB): Up to 3 dB more talk power with clean, punchy audio
  • MultiFlex™: Two SmartSDR clients can operate independently—perfect for shared stations or remote collaboration

With its dual-SCU design, integrated touchscreen interface, and full complement of SDR features, the AU-520M delivers the full power of a modern multi-component HF station in a single, self-contained package—ready for the shack, field, or remote site.

The AU-520M is a true SO2R (Single Operator Two Radio) solution, designed for serious contesting with dual SCUs, integrated 7th-order bandpass filters, and full isolation between receivers. Built-in OTRSP support makes integration with logging software like N1MM+ effortless—no extra hardware or wiring needed. It’s a plug-and-play SO2R contest powerhouse, ready right out of the box.

Specs

  • Weight: 31 oz

General

  • Remote Operation: SmartLink™ included
  • Client Options: Integrated Maestro™, plus PC, Mac, iPhone®, iPad®
  • Integrated GNSS Receiver: 12-channel GPS, Galileo, GLONASS, QZSS, SBAS
  • Time to First Fix (Cold): <35s
  • Frequency Stability (0°C–50°C): 0.001 ppm (GNSS), 0.5 ppm (TCXO)
  • Optional High-Performance GPSDO: 10 MHz output, 5 × 10⁻¹³ stability over 24 hours
  • External 10 MHz Reference Input: Yes
  • Power Requirements: 80–264VAC, 35W Receive, 675W Transmit
  • Dimensions: 6.74”H × 14”W × 13.25”D (17.1 × 35.6 × 33.7 cm)

Receiver:

  • Spectral Capture Units (SCUs): 2
  • Independent Band/Mode Receivers: 4
  • Slice Receivers: 4
  • Frequency Coverage: 30 kHz–54 MHz
  • 2 kHz RMDR: 110/115 dB
  • Dynamic Range (Max Zoom): >145 dB
  • ADC: 16-bit @ 122.88 Msps direct sampling
  • Amateur Band Preselectors: 7th order
  • DAX / DAX IQ Channels: 4 / 4
  • Receive-Only Ports (Base / Including XVTR Ports): 2 / 4
  • Full Duplex RX/TX Operation: Yes

Aurora Transmitter

  • 160m–10m Transmitter Output (Amateur Bands Only): 1–500W PEP (125W AM)
  • 6m Transmitter Output: 1–200W PEP (50W AM)
  • Harmonic Suppression: ≤ –60 dBc
  • Transverter Ports: 2
  • Transverter IF Frequency Coverage / Power: 100 kHz–54 MHz / adjustable up to +10 dBm
  • Integrated Automatic Antenna Tuner Range: 3:1 SWR
  • Adaptive Pre-distortion: Included (SmartSignal™)
  • Supported Modes: SSB, CW, AM, FM, RTTY, Digital

Spectrum/Waterfall Display

  • Internal Touch Panel Display Size: 8-inch (integrated)
  • Integrated Display Resolution: 1920 × 1200 IPS
  • Spectrum/Waterfall Displays (Max): 2
  • Spectrum/Waterfall Bandwidth (Min / Max): 5 kHz – 14 MHz
  • Spectrum Resolution Bandwidth (Min): 1.46 Hz/pixel (bin)
  • Spectrum Dynamic Range (Max Zoom In): >145 dB
  • External Display Support: HDMI®

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FlexRadio does not charge your credit card until your order ships, but we do pre-authorize the full purchase price at the time you place your on-line order.

Due to the price class of a FLEX AU-520M, your order may exceed your credit card’s daily transaction limit resulting in your order not being completed. In these cases, you may either contact your credit card company and negotiate a different daily purchase limit -OR- you can call the FlexRadio Sales department at 512-535-4713 ext 1 to place your order over the phone where we will not pre-authorize order payment until time of shipment.

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