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PCL84

Sensibly equivalent to:
15DQ8
See also:
Valves and their Habits
    
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The PCL84 is a television triode and output pentode. Granada were one of the main ITV companies in the UK and also one of the major TV rental businesses, they did not make valves. It is interesting to speculate as to who made them.
Within the envelope the triode section is quite small, about 2.5 mm thick and the anode cavity area is 18mm x 7 mm. The output pentode is 11 mm front to back with a similar anode box area. No audio power rating has been found, this suggests a use in video output, but Mullard are not specific as to use, other data sources confirm the video function..
The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins it is 59 mm tall.
References: Datasheet & 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
3.0
16.2k
4.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 30, 2011.
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