I assembled the beacons and put one on the robot, the other "to be found."

The "to be found" beacon sends out so much signal in all directions (it does that on purpose--for moving targets to find one another) that it was hard to tamp down and directionalize for homing purposes. I put that beacon in a sealed cardboard box with a slit and am now getting some results I can work with.

My software needs some work to make the wheels line up with the sensor detection--that will be a later post.