Sep 21 2011
Here I am using the Tunable Notch Filter as I search for 600 Meter beacons. You can add as many filters as you wish.
Sep 14 2011
See and hear some beacons first hand at receivedsignal.us
Feb 19 2011
Look at the 10 meter PropNet catches for the past 24 hours (today is Saturday Feb. 19). Circuits all over the place!
Nov 03 2010
Here is an interesting paper on a radio based approach to location.