I don’t use external TNCs, but I have friends that do, and every once in a while a friend or customer will ask me about a cable to connect one particular Kantronics TNC to one particular radio, and I always refer them to this company – Associated Radio – they have been making custom interface cables for years now and their prices are reasonable in my opinion.
Associated Radio
8012 Conser
Overland Park, KS 66204
(800) 497-1457
I was initially directed to them by Kantronics technical support, and I encourage anyone looking for custom Kantronics TNC-Radio interface cables to give them a call.