open source
radio direction finding
SDR
software defined radio
beamforming, coherent sdr, fox hunting, GNU Radio, ham radio, interferometry, krakenrf, krakensdr, open source sdr, radio astronomy, radio direction finding, radio tracking, rdf, rtl-sdr, sdr, search and rescue, signal detection, software defined radio, transmitter hunting, vhf tracking, wireless signals
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Unlock the Power of Radio Direction Finding with KrakenSDR
Are you passionate about radio technology, signal tracking, or even advanced applications like beamforming and interferometry? If so, KrakenSDR is the ultimate tool you need. This powerful, coherent software-defined radio (SDR) opens up a world of possibilities for professionals, hobbyists, and emergency responders alike.
What is KrakenSDR?
KrakenSDR is a cutting-edge, five-channel coherent-capable SDR system designed for high-precision applications such as radio direction finding (RDF) and beamforming. Unlike traditional SDRs, KrakenSDR ensures phase coherence across its five channels, making it an invaluable asset for tracking radio signals with pinpoint accuracy.

Why Choose KrakenSDR?
With its ability to detect and locate unknown transmissions, KrakenSDR is ideal for:
- Finding Unknown Transmitters: Locate sources of interference, illegal broadcasts, or rogue transmissions.
- HAM Radio Experiments: Engage in exciting radio fox hunts and monitor repeater abuse.
- Asset & Wildlife Tracking: Use low-power beacons to track animals, lost ships, or valuable assets beyond network coverage.
- Emergency Search & Rescue: Locate emergency beacons with ease, aiding in life-saving missions.
- Interferometry & Beamforming: Perfect for radio astronomy and advanced signal processing applications.
Advanced Radio Direction Finding (RDF)
KrakenSDR employs correlative interferometry—a highly advanced RDF technique that leverages phase information from an antenna array. Unlike simple directional antennas that require manual adjustments, KrakenSDR automates the process with precision algorithms like MUSIC, allowing for fast and accurate triangulation of any signal source.

What You Need to Get Started
Setting up your KrakenSDR system is easy. You’ll need:
- A KrakenSDR unit
- A five-element antenna array (such as the Krakentenna magnetic whip set)
- A Raspberry Pi 4 (or similar computing device) to run the KrakenSDR software
- An Android device for mobile tracking and mapping (optional)
- A USB Type-C cable & 5V/2.4A+ power supply
How KrakenSDR Achieves Coherence
KrakenSDR integrates five customized RTL-SDR circuits, each featuring R820T2 tuners and RTL2832U ADC chips, all synchronized to a single local oscillator. This ensures that all received signals maintain phase stability. Additional built-in calibration hardware fine-tunes these signals, eliminating phase offsets and improving accuracy.

Hardware Highlights
- Five-channel RTL-SDR with phase coherence
- 24 MHz – 1766 MHz tuning range
- SMA female RF input ports
- Bias tee (4.5V) for active antennas
- Rugged aluminum enclosure with heat management
- USB Type-C power and data connections
Open-Source Software & Mobile Integration
KrakenSDR provides open-source Data Acquisition (DAQ) and Digital Signal Processing (DSP) software. The DSP software implements advanced RDF algorithms and integrates seamlessly with GNU Radio. Additionally, KrakenSDR offers:
- An Android App: Automatically determines transmitter locations and provides turn-by-turn navigation.
- A Web Interface: Configure frequencies, gains, and monitor real-time signal data.
- Cloud-Based Mapping (Alpha): Log and visualize transmitter locations across multiple sites.
Real-World Applications
Imagine mounting a KrakenSDR antenna array on your vehicle’s roof, connecting it to a Raspberry Pi and an Android phone. As you drive, KrakenSDR continuously calculates signal bearings, mapping their sources in real-time. Within minutes, you can locate a signal with unmatched accuracy. Whether you’re hunting down interference, conducting radio experiments, or aiding in search and rescue, KrakenSDR is your ultimate solution.
Get Started with KrakenSDR Today!
KrakenSDR is revolutionizing the way we track, locate, and analyze radio signals. Whether you’re a researcher, amateur radio enthusiast, or emergency responder, this device is a game-changer.
Ready to take your SDR experience to the next level? Visit KrakenSDR and get yours today!
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