remotewizard

One last test: I enclosed my Netduino in a grounded metal box, ran twisted pair wiring out to the GPS (sans battery), and it still wouldn't lock.  I'm afraid you're right.

One last thing: I did take it out for a drive, and it tracked quite nicely!

Less than three minutes on the LiPo (still on the desk next to the unplugged Netduino) and I have a fix.  Reattached to the Netduino and get this:

3D-Fix: False, Sattellites: 3, Time: 03/28/2014 23:32:48, Latitude: 4XXX.4XXX,N, Longitude: 09XXX.1XXX,W, Altitude: 190.2,M, Knots: 0.649999976 (1.26880002 km/h)

Twenty more minutes with the battery in, and nothing,

Disconnecting from the Netduino and attaching the LiPo  (but not moving to the windowsill) next...

It's been cooking for over a half-hour with no battery, and I still haven't got a lock.

Trying next with battery inserted, but still powered from the Netduino.