Für digitale Betriebsarten im Amateurfunk, z.B. Home-brew a SignaLink clone using a cheap USB sound card and a handful of junk box The SignaLink USB Interface is a USB powered device that contains a sound card and VOX circuitry that keys the radio PTT whenever the digital. What the computer software needs is a way to get receive audio from the radio to the computer, a way to get transmit audio from the computer to the radio, and a way to key the radio so it will transmit. Although the sound card interface can be modified with some extra circuitry, I elected to put this extra “stuff” on a separate board, with a few basic components to make it easier to solder and route wires. An Allstar node is build from a Radio, A computer (Raspberry Pi) and a sound card interface.

The main components of an Allstar node.It also uses an opto IC for TX, therefore this unit totally isolates the radio from the PC for ALL digi modes such as:. This unit it a home built interface using isolating transformers for input and output connections to the PC / Radio.