[Jeff McCune]

We ran into this problem too. Much past 20 feet or so the tracker was horribly inaccurate. It'd find the beacon OK, but it'd be +- 10 degrees, which doesn't help things terribly much.

I completely re-wrote the tracker and receiver code and interrupt routines in order to get a 3 sensor tracker. I added a third sensor in the middle that simply stares down a bic pen tube and is completely sealed off with electical tape. Works incredibly well this way, as the tracker needs to be pointing *directly* at the beacon in order to get all three receivers to register.

I can post pictures / code if you want.