The MVSPenB was probably introduced in the late 1930s. It has the standard mains heater of the day, 4.0 V at 1.0 A. This variable μ pentode was designed for RF and IF amplifier service in superhet radio receivers.

The classic envelope is 43 mm in diameter and, excluding the B7 base pins, is 104 mm tall.

 
Pin Connections

B7	1	2	3	4	5	6	7	tc
	m	a	g3	h	h	k	g2	g1

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	4.0	1.0	200	100	-1.5	4.3	1.3	0.6M	2.2

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 09 June 2007 {find valves by name}