Yaesu FT-450
Rear Panel

 

The Yaesu FT-450 rear panel has an SO-239 antenna jack, ground lug, 8-pin DATA output jack (provides band selection data), 8-pin TUNER jack (provides band selection data for control for an optional antenna tuner, 8-pin LINER jack (provides band selection data for an optional linear amp), 9-pin serial DB-9 CAT jack allows external PC control (software and cable not supplied) and external speaker jack.