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30P12

Sensibly equivalent to:
12FB5 N369 PL801
See also:
Valves and their Habits
    
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The 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. The Mullard Type designation of PL801 is also on the envelope. The prominence of the 30P12 suggests that Mullard were secondary makers of the design.
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 copper supports of the control grid are connected to the carbonised heat sink seen above the top mica.
The hole in the end wall of the anode reveals the beam plates.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 69 mm tall.
References: Data-sheet & 1040 Type 30P12 was first introduced in 1958.

 

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 May 21, 2020.
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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