This modification to the stock mic will bring you excellent transmit audio reports:
- Open the mic case.
- Remove the 3 larger internal screws and the 1 smaller screw in the microswitch.
- Move the PC board away from the tiny mic element so you can access it.
- VERY carefully remove the tiny electret mic element from its cylindrical housing using a fine tipped tool. Work it out beginning at the edge where you can pull on the rubber "grommet".
- Shake the plastic baffle out of the electret housing.
- Carefully force a sewing needle through the 3rd mic hole that's normally blocked.
- Insert the electret element back into its cylindrical housing carefully, leaving the plastic baffle out.
- Re-assemble the mic case.
- Set the MIC gain to about 55 and enjoy the excellent transmit audio that was previously limited by the plastic "noise baffle".
The improvement is dramatic.
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