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PCL85

Sensibly equivalent to:
18GV8 PCL805
See also:
Valves and their Habits
    
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The PCL85 is a triode and output pentode combined. The PCL85 was used as frame output valve on monochrome tv's and occasionally (ITT CVC5 chassis) colour tv's. The pentode section does not have an audio output rating.
6202 were a reseller. One internet source states that the company telephone number in the 1960s was CRO 6202. CRO being the code for Croydon south of London.
The output pendode on the left separated from the small triode by the screen in the middle.
The top of the triode is supported by a mica sheet fixed to the screen. The triode box cathode has a slight curve on the front and back and so not perfectly rectangular.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 71 mm tall.
References: Datasheet & 1040. Type PCL85 was first introduced in 1961.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
a(t)
g1(t)
k(t)
h
h
a
g2
k,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

 

Absolute Maximum Operating Conditions
Triode
Va
Vg
mAa
ra
gm
100
0
10
9,000
5.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 20, 2019.
shape:thin.glass.tube construction:all.glass type:triode.pentode age:1960.1975 base:b9a heater:300ma pins:9 pin:1.a(t) pin:2.g1(t) pin:3.k(t) pin:4.h pin:5.h pin:6.a pin:7.g2 pin:8.k.s.g3 pin:9.g1
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