The PL519 was a line output valve, or sweep tube as they were known in America. This example is of late manufacture and probably the last to be produced before transistors took over the role.

The parameters given are taken from the dat sheet and refer to pulse operation.

The wide glass tube envelope is 36 mm in diameter and, excluding the B9D base pins, is 112 mm tall.

 
Pin Connections

B9D	1	2	3	4	5	6	7	8	9	tc
	g1	g3	g2	h	h	g2	g3	g1	k	a

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs
	40.0	0.3	160	160	-10	1,400	45.0

Thanks to Frank Philipse for supplying the above datasheet

This exhibit was last updated on 02 February 2008 {find valves by name}