A Case and input !

The case is getting there, a switch to inhibit the PTT, Green LED to show power for the USB and a red LED to show that the interface is in PTT mode.

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Left is pre-sets to control the volume in and out. It also has a common mode choke to protect the USB, which is a new addition to the circuit. Centre is the Audio isolation and VOX. Right is the start of a delay circuit.

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