Agreed. Consider checking voltage at the mic plug (carefully). Should be +8 volts. See attachment.
On Tuesday, August 2, 2022 at 03:13:32 PM PDT, J.D. Barron <jeter.d.barron@...> wrote:
I don't know what mike you are using, but Icom, especially the older ones, need a high output to function correctly.
Most are electret amplified and have + voltage on the mike lead to provide the operating voltage.