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PC88

Sensibly equivalent to:
4DL4
See also:
PC88 - UHF Tuner Valve - Making a Mullard Valve - Valves and their Habits - Mullard Triodes for UHF Tuners - PC86 and PC88 Advert - PC86 and PC88 Advert - AA119, EH90, PC86 & PC88 Advert
    
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The PC88 is a UHF triode designed for the front end RF amplifier in Band IV and Band V television tuners. Mullard describe the PC88 as: a UHF frame-grid grounded grid amplifier triode. This exhibit was made by Philips and carries the Made in Holland wording.
The anode is an open ended rectangle with the flat end facing the grid. Here the open end is seen.
The anode on the right is close to the frame grid in the centre. The frame grid winding is of very fine wire held under tension.
The cathode and grid wires seen from the rear.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 42 mm tall.
References: Datasheet & 1040. Type PC88 was first introduced in 1962.

 

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

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
3.8
0.3
160
-1.25
12.5
4,800
13.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 25, 2019.
shape:thin.glass.tube construction:all.glass type:triode age:1960.1975 base:b9a heater:300ma pins:9 pin:1.g1 pin:2.k pin:3.g1 pin:4.h pin:5.h pin:6.g1 pin:7.g1 pin:8.a pin:9.g1
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