The L63 is an octal based amplifier triode. It is a low impedance device and used at audio frequencies.

We have several exhibits of this valve. with different envelope shapes.

The Marconi label is still present on this valve.

The classic envelope is 36 mm in diameter and, excluding the IO base pins, is 82 mm tall.

 
Pin Connections

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

 
Absolute Maximum Operating Conditions

Triode	Vh	Ah	Va	Vg	mAa	ra	gm
	6.3	0.3	250	-8	9	7,700	2.6

Thanks to Frank Philipse for supplying the above datasheet

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