CE3TSK · JTDX Contest Edition

Downloads

Windows and Linux builds of JTDX Contest Edition, the documents, and the recorded air the measurements were made on. Everything here is free and licensed under the GNU GPL v3.

The program

Windowsx86_64 · v3.0.0-rc07

An installer. Windows 10 and 11, 64-bit.

jtdx_contest-3.0.0-rc07-win64.exe 30.1 MB

SHA-256 4da9943ab7a9d52dafe7da6c986db993fd8b763aa6a46efb41bd61464e3fad67

Linuxx86_64 · v3.0.0-rc07

An AppImage: one file, no installation. Built on Ubuntu 22.04, so it runs on that and anything newer.

JTDX_contest-3.0.0-rc07-x86_64.AppImage 45.6 MB

SHA-256 d305c9e6231bcdecb5e541c6495da5e820570643a2cc74e8e12fe0a8790dc1d2

Before you run it

Linux: make the file executable once, then start it: chmod +x JTDX_contest-*.AppImage and ./JTDX_contest-*.AppImage

Windows: the installer is not code-signed, so SmartScreen may warn about an unknown publisher. The SHA-256 above identifies the file you downloaded; SHA256SUMS holds both lines.

Documents

How the decoder works The long explanation, with the diagrams. Reads in a browser, in eight languages. HTML · 615 kB The measurements as a paper Method, tables and conclusions in the form a club or a magazine can print. PDF · 244 kB Inside the FT8 decoder The pipeline drawn out, pass by pass. PDF · 541 kB What changed for WW Digi 2026 The contest support and the decoder work, as taken into that weekend. PDF · 246 kB All the documents in one archive The four above, to read offline. ZIP · 1.1 MB

The air the numbers came from

Benchmark WAV suites and the script Two recorded hours, the crowded-band files with their truth sets, and a script that replays them on your own machine and prints the same columns the documents quote. ↗ The complete source Every change, on GitHub, under the GNU GPL v3. ↗