This rectifier from Mullard is directly heated. The maximum reservoir capacitor is 4 µF and the minimum series resistance has to be 150 Ohms.

The classic envelope is 46 mm in diameter and, excluding the B4 base pins, is 122 mm tall.

 
Pin Connections

B4	1	2	3	4
	a(1)	a(2)	f	f

 
Absolute Maximum Operating Conditions

Rectifier	Vh	Ah	Va	mAa
	4.0	3.0	850	125

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 12 June 2007 {find valves by name}