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PL84

Sensibly equivalent to:
15CW5 30P18 N379
See also:
Valves and their Habits
    
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The PL84 audio output pentode was designed for use in television receivers. Like the UL84 with a 100 mA heater it is a low voltage high current version of the EL84, itself a standard in design.
The discoloured envelope indicates that this exhibit has had a hard life.
The remains of the GEC logo and Made in Britain underneath.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 69 mm tall.
References: Data-sheet & 1040. Type PL84 was first introduced in 1956.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
ic
g1
k,g3
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 PDF datasheet.
Updated September 11, 2020.
shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b9a heater:300ma pins:9 pin:1.ic pin:2.g1 pin:3.k.g3 pin:4.h pin:5.h pin:6.ic pin:7.a pin:8.ic pin:9.g2
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