WSPR Beacon

The Weak Signal Propagation Reporter Network is a group of amateur radio operators using K1JT's MEPT_JT digital mode to probe radio frequency propagation conditions using very low power (QRP/QRPp) transmissions. WSPR (pronounced "whisper") stands for "Weak Signal Propagation Reporter". It is a protocol, implemented in a computer program, used for weak-signal radio communication between amateur radio operators. The protocol was designed, and a program written initially, by Joe Taylor, K1JT. The software code is now open source and is developed by a small team. The program is designed for sending and receiving low-power transmissions to test propagation paths on the MF and HF bands. WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Transmissions carry a station's callsign, Maidenhead grid locator, and transmitter power in dBm. The program can decode signals with a signal-to-noise ratio as low as −28 dB in a 2500 Hz bandwidth. Stations with internet access can automatically upload their reception reports to a central database called WSPRnet, which includes a mapping facility.

WSPR Beacon


  • Always active H24/7, in transmission every 10 minutes and used for WSPR mode 2


  • 14.0956 Mhz (20m) 200 Band Width (Hz)


  • 100 mW 20 dBm


  • TAPR 20m Transmitter Ver. 2.1
  • Raspberry, Pi 3 Modello B+
  • 1/4 wave dipole with Diamond BU-50 Balun 1:1

WSPR Beacon