The 12A6 American metal beam tetrode was designed for use in single end audio stages of receivers, mainly domestic but the rugged construction made them ideal for military use as well.

The thin metal tube envelope is 25 mm in diameter and, excluding the IO base pins, is 67 mm tall.

 
Pin Connections

IO	1	2	3	4	5	6	7	8
	m	h	a	g2	g1	-	h	k

 
Absolute Maximum Operating Conditions

Beam Tetrode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout
	12.6	0.15	250	250	-12.5	30	3.5	70k	3.0	2.4

Thanks to Frank Philipse for supplying the above datasheet

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