I recently installed a RPi with a Pro Stick Plus and the FA antenna on a tower. Feed worked spectacularly for about 4 hours then no data was being sent.
About 12ft above the antenna is an FM radio station transmitter. Has someone had a similar issue? I plan to install a new dongle with a FA filter.
I doubt the external FA filter is going to help you much here. It may help with the FM transmitter (400W, 12ft away, with no filtering, is almost certainly why the preamp is unhappy) but it won’t help with the SSR antenna; the external FA filter has a wide passband and will let 1030MHz straight through.
You need something more specialist here, a filter with a narrow passband around 1090MHz that attenuates 1030MHz strongly.