I upgraded my Icom
M502 to an Icom
M504. I am still ( or want to)using the HM127B command Mic from the M502.
The Command shows, changes channels however no reception
from the Command Mic. The main radio
I have searched the web and see the Command Mic for a M504 is listed as a HM157.
The cable is also listed as a difference # OC1000 (502) OC 999 (504), my question, does anybody know is the HM 127 mic will work
on a M504 radio
Would I need to replace the command Mic also?