Amazon.com: Digirig Mobile - Integrated Digital Modes Interface for Amateur Radio (Rev 1.9) : Electronics
Ham radio Homebrew soundcard interface with cheap sound card - YouTube
Digital Modes Interface - www.billy.gr
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Tigertronics SLUSBHTY-P Tigertronics SignaLink USB Digital Communications Interface Combos | DX Engineering
Tindie Blog | Scan the airwaves with this USB HAM Radio interface!