I now understand that all mics are different and have different frequency responses and vocal characteristics. The mic has to be tailored to get enhance it's characteristics and then set up for your voice. You can see the EQ settings further down the page.
EQ settings as helped by 2E0KAX & M0VDO
The above file is an audio recording on the 18th July 2020 with good propagation - i’m using a bandwidth of 100-3500KHz, and received signal strength around 20db over. So very clear to the recieving station.
homemade ptt (it works)
Audio isolation