KD9TAW · Amateur Radio Software
Open-source tools for weak-signal HF and off-grid comms.
I build amateur radio software — next-generation weak-signal digital modes and chat-first HF messaging. Free, open, and made for operators who push the edge of the band.
The Workbench
Tools
Tempo
activeOff-grid HF text messaging at the speed of conversation.
WSJT-X (FT1)
experimentalRun the FT1 weak-signal mode inside WSJT-X — the application you already know.
Weak Signal Sleuth
activeCatch 6-meter openings the instant they start — a desktop early-warning system for 6m and 2m band openings and meteor scatter.
MSHV Auto DX Chaser
activeAutonomous, intelligent DX hunting for MSHV — listen first, then pounce.
One signal core, two apps
The FT1 ecosystem
The FT1 weak-signal mode powers two apps that share the same DSP core: a WSJT-X integration you already know, and a chat-first HF messenger. One protocol, two ways to get it on the air.
Operator
Software developer, DXpeditioner, DX chaser.
I'm KD9TAW — I write software for a living and chase weak signals for fun. I designed the FT1 and DX1 waveforms behind Tempo, and these tools come out of real time on the radio: pursuing DX, joining DXpeditions, and pushing what's possible on the HF bands.
Live from QRZ logbook