I bought a second-hand Kenwood TH-D74A recently (through Craigslist). I’ve messed about with APRS on it, used it for my first SOTA activation, and now am trying to get it hooked up to my Raspberry Pi to use its built-in KISS TNC for Winlink and packet BBSes. K1CHN’s post has been useful. However, shortly after connecting something is leading to it “disconnecting” over USB, with cdc_acm ...: failed to set dtr/rts showing up in the kernel message and (re)adding a new device for the radio. My first guess is that it might be resolved with a choke on the USB cable, but I might try Bluetooth first…