Ferrite, leads

[allsorts]

There is power on the GPS antenna socket. I think all GPS antennas need power to bring the incredibly low level signals from the satellites up to a level that'll get along a few yards of coax cable. On the GPS module Pin 3 VANT is connect to the +3.3 V rail and internally to pin 1 ANTENNA IN.

I'm using one of the cheap GPS antennas underneath a slate roof without any issues. Currently:

100% availabilty, 18 tracked, 20 in view, 10 GLONASS.