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PCL805

Sensibly equivalent to:
PCL85
    
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The PCL805 triode pentode was purpose designed as a domestic television receiver frame output stage for monochrome sets. This example carries the brand name of Granada a television production company in the UK who also operated a chain of television rental shops in the era of expensive and unreliable televisions. As is common with TV valves it is designed to operate at a relatively low voltage and high current. The beam tetrode has a quoted load resistance of 4,000 Ohms.
The literature gives ratings for audio service but the PCL86 was the normal audio stage valve.
The small triode section in the foreground has a bright electrostatic screen between it and the large pentode power section.
The pentode section has a cooling fin at the top of the copper control grid support rods. The holes in the side of the triode anode reveal the grid, also wound on copper supports.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A pins is 70 mm tall.
References: Datasheet & 3002. Type PCL805 was first introduced in 1968.

 

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

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
18
0.3
170
170
-15
41
2.3
25k
7.5
3.4W

 

Absolute Maximum Operating Conditions
Triode
Va
Vg
mAa
ra
gm
100
0
10
8300
1.4
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 03, 2013.
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