▼ Menu

PCL86

Sensibly equivalent to:
14GW8
See also:
Valves and their Habits
    
Extras ▼

 

The PCL86 was designed for the audio stage of a television receiver and offered a quality output.
The triode section provided 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%, more than adequate for a domestic television receiver.
The triode is seen face-on with the screen separating it from the pentode section.
The pentode section has only two grids. The suppressor function is provided by beam forming plates - Mazda has implemented the design as a beam tetrode.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 70 mm tall.
References: Datasheet & 1040. Type PCL86 was first introduced in 1961.

 

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 January 03, 2015.
Return to Main Index