After some blind testing and a lot of debugging:
...here's the external mic/ptt schematic for the Telemobile HX-340 handie
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhl1WymiUY-u7s_XduuZCBZC5vJZDV3pJp8-wlSHe3wHCIYkhKCklKlW6oPAtb1pZ1OWgs6ciqj0tjLmOPOCGTZr1t1SwtdFekRQYDJg7o1N-uiG9qewkJAeDSO9wgfus1otqF3/s320/hx-340-external-mic.jpg)
Without a schematic of the radio I have no idea if this is the best way for connecting an external mic/ptt but, anyhow, it worked.
Audio is not perfect but workable and can be tailored with a better mic or slight change on the bypass cap.
Have a nice weekend!
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