This audio output valve appears to have been designed for American voltages, but although not marked, the type was introduced by Mullard.

With an anode load of 2,500 Ohms it would deliver in a single ended configuration 1.9 Watts at 9 % distortion. Probably used for Television receivers.

The thin glass tube envelope is 44 mm in diameter and, excluding the B7G base pins, is 85 mm tall.

 
Pin Connections

B7G	1	2	3	4	5	6	7
	k	g1	h	h	g1	g2	a

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	50.0	0.15	110	110	-7.5	49	4.0	10,000	7.5	1.9	9%

This exhibit was last updated on 08 June 2001