Well, I did a bit of fiddlin’ with WSPR-X this evening. Here’s the results …
I was transmitting 5 watts, using a 31-ft vertical. If you’re more interested in how WSPR-X works, it’s one of the modes included in W1JT’s WSJT-X ver. 1.8.0 software. WSPR is explained at http://wsprnet.org.
73 de Dick N4BC