09-06-2022, 07:28 PM
I don't have the radio either but have seen similar with other Icom radios i.e. it could be the issue i.e. the TX frequency is outside the radio's band limits.
Page 51 of the user manual:
IC-2730A_InstructionManual.pdf
Page 51 of the user manual:
IC-2730A_InstructionManual.pdf