The 76 is an amplifier triode, probably a general purpose device.

The classic envelope is 36 mm in diameter and, excluding the UX5 base pins, is 86 mm tall.

 
Pin Connections

UX5	1	2	3	4	5
	h	a	g1	k	h

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.3	250	-13.5	5.0	9,500	1.45

Thanks to Frank Philipse for supplying the above datasheet

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