A quick search shows many antenna threads but not one that quite touches on selection. I have no opinions on antenna models or brands, and honestly it seems that antenna manufacturers seem to have many model numbers for antennas that look exactly the same to me
I randomly selected some options from ACS, please let me know your thoughts or other recommendations:
GDL UAT Antenna (bottom) RAMI AV-22 (ACS 65)
GTX Transponder Antenna (bottom) RAMI AV-22 (ACS 65)
GTR Com Antenna (bottom) RAMI AV-17 (ACS 179)
GTN Com Antenna (top) RAMI AV-10 (ACS 168)
GTN Nav Antenna (right) Archer SA-001 (ACS 100)
I randomly selected some options from ACS, please let me know your thoughts or other recommendations:
GDL UAT Antenna (bottom) RAMI AV-22 (ACS 65)
GTX Transponder Antenna (bottom) RAMI AV-22 (ACS 65)
GTR Com Antenna (bottom) RAMI AV-17 (ACS 179)
GTN Com Antenna (top) RAMI AV-10 (ACS 168)
GTN Nav Antenna (right) Archer SA-001 (ACS 100)