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PC88

Sensibly equivalent to:
4DL4
See also:
PC88 - UHF Tuner Valve - Valves and their Habits
    
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The PC88 is a frame grid UHF triode designed for the front end RF amplifier in Band IV and Band V television tuners.
The construction is planar with the cathode, grid and anode placed in-line. The flattened cathode has a frame grid surrounding it. Beyond the grid, in the foreground of the image, is a square U channel anode with its flat end to the grid. The approach to a minimizing the lead inductance is to use multiple pins for the grid connection. The relatively high anode current was employed to reduce noise.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 44 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 April 16, 2014.
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