The U5 has the distinction of being the first full wave rectifier. The U5 was introduced by the Marconi-Osram Valve company in 1926.

From the picture it can be seen that each filament is an inverted V and that the two filaments are connected in parallel. Each anode cavity is a flattened cylinder without any coating.

The balloon envelope is 52 mm in diameter and, excluding the B4 base pins, is 93 mm tall.

 
Pin Connections

B4	1	2	3	4
	a1	a2	f	f

 
Absolute Maximum Operating Conditions

Rectifier	Vh	Ah	Va	mAa
	5.0	1.6	400	60

This exhibit was last updated on 02 December 2007