The PL84 audio output pentode was designed for use in television receivers. Like the UL84 with a 100mA heater it is a low voltage high current version of the EL84, itself a standard in design.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 69 mm tall.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	ic	g1	k	h	h	ic	a	ic	g2

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm	Pout	D
	15	0.3	170	170	-12.5	70	5.0	20,000	6.4	3.5W	10%

Thanks to Frank Philipse for supplying the above datasheet

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This exhibit was last updated on 10 June 2007 {find valves by name}