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PCL86

Sensibly equivalent to:
14GW8
See also:
Valves and their Habits - New Mullard Television Valves
    
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The PCL86 was designed for the audio stage of a television receiver and offered a quality output. In 1961 Mullard developed a combination of an ECC83 triode and an EL84 output pentode in a single envelope and this was the ECL86. The PCL86 was the series heater chain version of that work, here made by Tungsram. Most consumer valve designs were licensed to other manufacturers.
The separate triode section would provide the first audio amplification, and the output pentode would drive the loudspeaker.
The PCL86 as a single ended audio amplifier would have a cathode resistor of 125 Ω and an anode load of 5,100 Ω and under these conditions would produce an output power of 4.1 Watts at a distortion of 10%.
The triode with the electrostatic screen behind.
The power section on the left is much larger than the voltage amplifier triode on the right.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 69 mm tall.
References: Data-sheet & 1040. Type PCL86 was first introduced in 1961. See also 1961 adverts.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
13.3
0.3
230
230
-5.7
41.0
10.5
16,000
7.5

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
13.3
0.3
230
-1.7
1.2
62,000
1.6
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 29, 2015.
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