The DL94 audio output pentode from Mullard was designed for use in battery portable radio receivers. Mullard describe the DL94 as a battery operated output pentode with centre tapped filament, and designed for operation with equal voltages on both screen and anode.

The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 44 mm tall.

 
Pin Connections

B7G	1	2	3	4	5	6	7
	f-	a	g2	-	fct	g1	f+

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	1.4	0.1	90	90	-4.5	9.5	2.1	100,000	2.15	0.27	7%

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 06 July 2007 {find valves by name}