The PCL85 is a triode and output pentode combined. The PCL85 was used as frame output valve on monocrome tv's and occasionally (ITT CVC5 chassis) colour tv's. The pentode section does not have an audio output rating as one would expect.

The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 68 mm tall.

 
Pin Connections

B9A	1	2	3	4	5	6	7	8	9
	a(t)	g(t)	k(t)	h	h	a(p)	g2	kp,s,g3	g1

 
Absolute Maximum Operating Conditions

Pentode	Vh	Ah	Va	Vs	Vg	mAa	mAs	ra	gm
	18.0	0.3	170	170	-15	41	2.7	25,000	7.25

Triode	Va	Vg	mAa	ra	gm
	100	0	10	9,000	5.5

Thanks to Frank Philipse for supplying the above datasheet

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