I have (4th owner) a Ten Tec Centurion amp. The manual addendum shows the load/tun approx positions for 12, 17, and 30m, but it doesn't say what "band" I should set the band switch to. Does 12m go to 10 or 15? Does 17 go to 15 or 20? Does 30 go to 20 or 40? Any help? thanks Doug