WeFax Decoder
Decode HF weather fax (radiofax) from maritime and aviation weather services.
Stations broadcast weather charts on fixed schedules via HF radio.
Station
Auto Capture
Automatically decode at scheduled broadcast times.
HF Antenna Guide
HF band (2–30 MHz) — requires HF antenna + direct sampling SDR
Requirements
- SDR: RTL-SDR v3/v4 with direct sampling mode
- Antenna: Long wire (10m+), random wire, or dipole for target band
- Mode: USB (Upper Sideband) demodulation
- Signals: Moderate — HF propagation varies by time of day
Quick Reference
| Protocol |
AM Facsimile (ITU-T T.4) |
| Carrier |
1900 Hz |
| Deviation |
±400 Hz |
| Black / White |
1500 / 2300 Hz |
| Start / Stop tone |
300 / 450 Hz |