Single-band WSPR beacon using an si5351 breakout for frequency synthesis and a Ublox 6M serial GPS unit for time synchronisation (see SPRAT #192, Autumn 2022). Since publishing this project in SPRAT I ...

High Altitude Balloon tracker for Arduino and Si5351, using WSPR protocol This program will let you turn your Arduino, GPS and Si5351 module into a low power QRP WSPR beacon that can send telemetry ...

WSPR’s biggest selling point is you can do it on the cheap. It’s easy to set yourself up for not much more than $100 and often a whole lot less.

The WSPR (Weak Signal Propagation Reporter, pronounced ‘whisper’) radio transmission technique was developed to enable considerable distances to be spanned using low power and minimum bandwidth. This ...

The project is based in part on the work of [Roman Piksayin] in his Pico-WSPR-TX package (which we covered before), which uses the Pico’s outputs to create the transmitted signal directly ...

A BBC documentary investigating the disappearance of flight MH370 has reexamined the theory that Weak Signal Propagation Reporter (WSPR) radio signals could help to locate the missing aircraft in ...