I see from your stats that you seem to be running a FlightFeeder but it says you have Version 10.
According to this post Version 10 is not available for the FlightFeeder:
Is it your own FlightFeeder or a FlightAware one?
Are you sure it is a corrosion problem and not that you might have broken things by updating the Firmware?
If it is a FlightAware FlightFeeder then they may be able to provide a replacement antenna if it has failed. It looks like there were some faulty ones supplied:
Support for FightAware managed FlightFeeders is at: