US Dollars
AU-520 – Dual-SCU 500W Integrated SDR Transceiver
The AU-520 raises the bar for serious HF and 6m operators, integrating a full-featured software-defined transceiver, high-efficiency 500W amplifier, automatic antenna tuner, and wide-range AC power supply—all in one compact, rugged chassis.
Built around the same cutting-edge RF architecture as its siblings, the AU-520 delivers up to 500W PEP with industry-leading efficiency—up to 80% peak—reducing heat and power demands while minimizing size and complexity in your station setup.
Designed without a built-in display or Maestro front panel, the AU-520 is ideal for remote stations, rack-mounted installations, or operators who prefer external control via SmartSDR™ for Windows, macOS, iPad®, iPhone®, or Maestro™ clients.
The AU-520 features two independent SCUs (Spectral Capture Units), each capable of digitizing wide portions of the HF/6m spectrum simultaneously. This dual-SCU configuration allows for up to 4 slice receivers and 4 independent panadapters, making it a powerful choice for contesting, diversity reception, multi-band monitoring, and advanced digital operation—all while maintaining full coverage from 30 kHz to 54 MHz.
Inside the AU-520:
-
500W high-efficiency transmitter
-
Integrated wide-range AC power supply
-
Automatic antenna tuner
-
SmartSignal™ adaptive predistortion for outstanding spectral purity
-
Controlled Envelope SSB (CESSB): Up to 3 dB more talk power without distortion
-
MultiFlex™: Enables two SmartSDR clients to operate independently on the same radio
With its dual-SCU design and fully integrated architecture, the AU-520 delivers the flexibility and performance of a multi-component station—without the clutter. Whether you're operating from across the shack or across the globe, the AU-520 is built to handle high-demand operation with ease.
The AU-520 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.
AU-520 Technical Specifications
RECEIVER
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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
SPECTRUM / WATERFALL DISPLAY
-
Spectrum/Waterfall Displays (Max): 4
-
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®
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
GENERAL
-
Remote Operation: SmartLink™ included
-
Client Options: PC, Mac, iPhone®, iPad®, Maestro™
-
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)
AU-520 – Dual-SCU 500W Integrated SDR Transceiver
The AU-520 raises the bar for serious HF and 6m operators, integrating a full-featured software-defined transceiver, high-efficiency 500W amplifier, automatic antenna tuner, and wide-range AC power supply—all in one compact, rugged chassis.
Built around the same cutting-edge RF architecture as its siblings, the AU-520 delivers up to 500W PEP with industry-leading efficiency—up to 80% peak—reducing heat and power demands while minimizing size and complexity in your station setup.
Designed without a built-in display or Maestro front panel, the AU-520 is ideal for remote stations, rack-mounted installations, or operators who prefer external control via SmartSDR™ for Windows, macOS, iPad®, iPhone®, or Maestro™ clients.
The AU-520 features two independent SCUs (Spectral Capture Units), each capable of digitizing wide portions of the HF/6m spectrum simultaneously. This dual-SCU configuration allows for up to 4 slice receivers and 4 independent panadapters, making it a powerful choice for contesting, diversity reception, multi-band monitoring, and advanced digital operation—all while maintaining full coverage from 30 kHz to 54 MHz.
Inside the AU-520:
-
500W high-efficiency transmitter
-
Integrated wide-range AC power supply
-
Automatic antenna tuner
-
SmartSignal™ adaptive predistortion for outstanding spectral purity
-
Controlled Envelope SSB (CESSB): Up to 3 dB more talk power without distortion
-
MultiFlex™: Enables two SmartSDR clients to operate independently on the same radio
With its dual-SCU design and fully integrated architecture, the AU-520 delivers the flexibility and performance of a multi-component station—without the clutter. Whether you're operating from across the shack or across the globe, the AU-520 is built to handle high-demand operation with ease.
The AU-520 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.
AU-520 Technical Specifications
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
SPECTRUM / WATERFALL DISPLAY
-
Spectrum/Waterfall Displays (Max): 4
-
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®
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
GENERAL
-
Remote Operation: SmartLink™ included
-
Client Options: PC, Mac, iPhone®, iPad®, Maestro™
-
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)
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