Weak Signal Propagation Reporter
wWhat is WSPR?
WSPR is a digital beacon transmission.
You can use your ssb transceiver for receive and transmit or use a stand alone transmitter for TX only.
A very nice tx is the wspr-lite classic that can make 0,2W or lower power levels on hf.
Also there is the wspr-flexi on the market, this one have more hf bands and 50 mhz .
The structured WSPR transmission sends 50 characters in 110.6 seconds, beginning one second after each even minute. Each message contains the station's callsign, a grid locator, and transmitter power expressed in dBm.