The 5Y3WGTA is a directly heated full wave rectifier. Electrically it is identical to the 5Y3GT, the A suffix denotes a rugged construction and long life. The 5Y3GTA was aimed at equipment for mobile and airborne use.
The maximum reservoir capacitance is 32 µF and minimum series resistance is 100 Ω.
The twin rectifier sections. The folded anodes are stitched together.
The CBS logo on this American made rectifier. The anodes sit low in the valve as the construction uses a modern glass foot construction and not the older pinch method.
The wide glass tube envelope is 28 mm in diameter, and excluding the IO base pins is 72 mm tall.
