The AZ41 is a full wave rectifier. The heater at 4.0 Volts looks back to the pre-war UK standard and the all glass miniature envelope looks to the world of post war miniature valves.

The AZ41 must have a minimum of 200 Ohms series resistance to limit the maximum current. The maximum reservoir capacitor must be no more than 50μF.

The side view shows the locating pip at the lower right hand corner.

The B8A base pins are equi-spaced and the locating pip is essential for correct orientation.

The thin glass tube envelope is 20 mm in diameter, and excluding the B8A base pins is 68 mm tall. The wider section at the base is 21.5 mm in diameter.

 
Pin Connections

B8A	1	2	3	4	5	6	7	8	9	tc

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	mAa
	4.0	0.72	500	60

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 24 November 2007 {find valves by name}