Allstar is a great way of linking simplex radios and repeaters together. However sometimes a radio is not required. With direct access to the net, either by Cat 5 or wifi all you really need is a way to receive audio, transmit audio and key up a node. This is what a radio-less node does. All that's required is a Raspberry Pi 3 a USB Sound FOB, a Microphone and Speaker and a few bits to connect it all together.
I used an old bluetooth speaker as the starting point. The case housed a mic preamp an LM-386 amp module to drive the speakers the usb sound fob and 8v regulator for the Icom mic that I was using. The Pi is mounted in a separate case which also includes a relay module and 5v regulator.
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