I'm affraid TL tables change a little with teh traveller version, I guess they've been adapted to current advances in real world.
So, while in CT (Bk3 pages 14-15, TTB pages 86-87) fusion power and gravitics were TL 8, already in MT (RC pages 28-29) they both have been moved to TL 9 (and kept them at latter versions, AFAIK). Similary, PA turrets in HG-MT were TL 14, while in MGT they have been moved to TL 8 (although the turret itself, needing to be a triple turret, is TL 9).