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PCC189

Sensibly equivalent to:
7ES8
See also:
Valves and their Habits - Frame Grid Valves - New Mullard Television Valves
    
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The PCC189 is a low impedance high gain double triode. The technical specification specifically states that it is built with frame grids. The valves are variable μ types for use at RF as AGC controlled devices. The low voltage high current suggests a low noise design, probably as the front end stages in a television tuner. The low anode voltage suggests both stages used as a cascode (series connected) amplifier.
Mullard describe the PCC189 as: a VHF variable-mu frame-grid cascode double triode.
The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins it measures 47 mm tall.
References: Data-sheet & 1040. Type PCC189 was first introduced in 1960.

 

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

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
7.6
0.3
90
-1.4
15
2500
12.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 17, 2014.
shape:thin.glass.tube construction:all.glass type:double.triode age:1960.1975 base:b9a heater:300ma pins:9 pin:1.a pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.a pin:7.g1 pin:8.k pin:9.s
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