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PL801

Sensibly equivalent to:
12FB5 30P12 N369
See also:
Valves and their Habits
    
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The PL801 / 30P12 beam tetrode was designed as a single ended audio amplifier output valve for television receiver use or as a TV frame scan output valve.
To operate successfully on the low anode voltage available in a TV receiver the valve has to operate at higher current to achieve the target output power of around 2 Watts.
The box anode from the side.
Face view of the anode. The control grid has a heat radiating fin at the top connected to both supports.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 66 mm tall.
References: Datasheet & 1040

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
ic
g1
k,g3
h
h
ic
a
ic
g2

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
Pout
D
12.6
0.3
170
180
-10.3
31
7.3
6.7
2.25
7%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 25, 2017.
shape:thin.glass.tube construction:all.glass type:beam.tetrode age:1950.1960 base:b9a heater:300ma pins:9 pin:1.ic pin:2.g1 pin:3.k.g3 pin:4.h pin:5.h pin:6.ic pin:7.a pin:8.ic pin:9.g2
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