WSPR

As regular readers of this blog will know, I just love WSPR. It amazes me that such weak signals can be detected so well at such great distances using this mode. I am even more impressed that such a simple "stand alone" (no PC needed) beacon can be constructed.  My very simple, TINY little 10m W5OLF WSPR-AXE beacon has been copied all over the world now. It is truly TINY.

See http://en.wikipedia.org/wiki/WSPR_%28amateur_radio_software%29 .