12 12.60 21 7.0 550 0.25 1N4468 12.35 13 13.65 19 8.0 550 0.25 1N4469 14.25 15 15.75 17 9.0 600 0.25 1N4470 15.20 16 16.80 15.5 10 600 0.25 1N4471 17.10 18 18.90 14 11 .