The A.R.C. Type 11, 12, 17, 21 sets all use the same A.R.C. 6151/MC-215 tuning linkage that the so-called "command sets" use. Mike / KK5F -----Original Message----- From: Hubert Miller <Kargo_cult at msn.com> Sent: Aug 19, 2021 12:00 AM Are those flex tuning cables compatible with A.R.C. Type 12 equipment? -Hue Miller