Hi everyone,

yesterday I started the development of the WSPR module add on for KX3 Companion. It’ll probably became a stand alone app as well.

Here’s a description of what WSPR is from WSJT Home page:

WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Normal transmissions carry a station’s callsign, Maidenhead grid locator, and transmitter power in dBm. The program can decode signals with S/N 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. To see a live version of the map pictured at top right, click here.

So WSPR is not a protocol for QSOs.

But it can be very handy to have a WSPR transmitter to check propagation and if our setup efficiency.

Unfortunately WSPR is not yet very popular and it’s also a quite complicated protocol.

Yesterday I started a transmit only module.

The information sent (and received) via WSPR are fundamentally 3: Callsign, Locator (first 4 digits) and the dBm power level that can go from 0 (0,001mW) to 60 (1000W). Usually you won’t go higher than 5W and it’s very interesting to test “sub watt” performances.

If you want to check some of my recent WSPRs you can look at my personal blog: http://iu4apc.com

72/73, Andrea IU4APC