KrakenSDR

Finding where a signal is coming from, which a single SDR cannot do.

Five-channel SDRDirection findingCoherentRTL-SDR

Price: $775
Availability: Listed
Design: Closed

Where to buy · 2 shops

Compare with similar devices

Sold through Crowd Supply rather than the maker’s own shop.

Radio equipment needs certification where you live (FCC, CE, UKCA, ISED, Anatel). Some devices are uncertified or restricted in Brazil. Buyers are responsible for their local law.

Bring along: A Raspberry Pi 4, five antennas and space to place them.
Keep in mind: Expensive, and receive only.

Source checked · Sep 18, 2026

Image credit
Crowd Supply project photo of the KrakenSDR · KrakenRF

(02) Blueprint

What’s inside

Closed design

KrakenRF publishes manuals, enclosure drawings, and 3D-printable antenna-array parts, but no schematic/PCB source for the 5-channel coherent receiver board.

Design files 4

Source 1

krakenrf/krakensdr_docsdocs199

git clone https://github.com/krakenrf/krakensdr_docs.git

Key parts 1

R820T2 (x5, via RTL2832U front ends)All R820T2 / R828D devices All RTL2832U devicesSDR tuner front end

Research notes

Checked every repo in the krakenrf GitHub account (krakensdr_docs, krakensdr_doa, krakensdr_suite, gr-krakensdr, heimdall_daq_fw) — all are software (DOA algorithms, DAQ firmware/drivers) or the docs repo above; no PCB schematic for the 5-tuner coherent receiver board was found, so it is treated as closed hardware. R820T2/RTL2832U have no official manufacturer-published datasheet (Rafael Micro/Realtek do not publish public datasheets), so no link is given — omitted rather than guessed.

Every link checked 2026-09-27.

Hand this device to your agent. Everything on this page, as clean Markdown and JSON: specs, shops, prices, design files, parts.

Markdown JSON

Made the KrakenSDR? Put the badge on your README; it links here, with every shop that sells it.

Specifications

Core hardware

Processor: Five RTL-SDR receivers sharing a single local oscillator, with coherence hardware
Display: None
Radio: 24 MHz to 1766 MHz tuning range (standard R820T2 range) · 4.5 V bias tee on each port
Power: USB-C, 5 V at 2.4 A or more

Details from the project page

Channels: Five channels, coherent-capable, all clocked to one oscillator
Synchronisation: Automatic coherence synchronisation in hardware, managed by the supplied Linux software
Software: Core DAQ and DSP software is open source and designed for a Raspberry Pi 4
Direction finding: Android app, free for non-commercial use
To get started: The unit, a USB-C cable, a 5 V 2.4 A supply and antennas
Antennas: A set of five magnet-mounted antennas is sold separately at US$259
Price note: US$775 is the version with the aluminium case, the one listed on Crowd Supply today

Buying

Price: US$775 on Crowd Supply
Availability: In stock on the day of review

What still needs checking

Crowd Supply project pages describe the campaign rather than a datasheet; dimensions, weight and full electrical specifications are often absent.
Prices and ship dates on Crowd Supply change; re-check before ordering.