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PCL84

Sensibly equivalent to:
15DQ8
See also:
Valves and their Habits
    
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The PCL84 is a triode and output pentode mainly for use as a video output stage in domestic television receivers.
The triode seen with the intersection screen behind. The grid looks to be gold plated and the supports are copper. The anode is stitched together.
The pentode section is mounted at right angles to the grid axis of the triode.
Looking into the pentode reveals the three wire grids. The suppressor grid has a very open winding.
The thin glass tube envelope is 21 mm in diameter and excluding the B9A base pins it is 58 mm tall.
References: Data-sheet & 1040

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
g1(t)
a(t)
k(t)
h
h
a
k,g3,s
g1
g2

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pdiss
15
0.3
220
220
-3.3
18
3.2
0.15M
9.5
4.0W

 

Absolute Maximum Operating Conditions
Triode
Va
Vg
mAa
ra
gm
200
-1.7
3
16.2k
4
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 07, 2025.
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