Yes you do need the hri200 with the ftm 100... check out a few youtube videos on the subject
Hi Robert, if you check out Yaesu's videos on YouTube, all your questions will be answered to help you get set up. But in the meantime, yes on the HRI-200. Yaesu's Official YouTube video on Wires-X https://youtu.be/ogq_49XeozY
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