Q: Will this adapter work with an Icom IC-A16 radio and GA headset? Also, will the PTT switch for Icom radios work with this adapter, radio?
A: No, for the IC-A16 you would need the OPC-2401 headset adapter for IC-A16. Yes, the Icom PTT will work with that adapter.
Q: If I don't connect a PTT, will the PTT on the A21 continue to work?
A: Yes, it will.
Q: Will this work with the IC-A21?
A: Yes, this works with the IC-A21.
Q: Is it compatible with an Icom IC-A22?
A: No, it will not. For the Icom IC-A22 you will need the Headset adapter for ICOM IC-A22 found here.
Q: Will this work on a ICOM IC-A5
A: This will not. For the Icom IC-A5 you will need the Headset adapter for Icom IC-A5 / IC-A23.
Q: Will this adapter fit an older Icom A4 handheld radio?
A: No, you will actually want to order the Headset adapter for Icom IC-A4.
Q: I just received Headset Adapter for ICOM A21. Which 'Push to talk' cable do I need? The one I have does not fit.
A: The Icom Push to Talk will work with this adapter.