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PFL200

Sensibly equivalent to:
16Y9
See also:
Valves and their Habits - PFL200 - Double Pentode for Dual Standard Receivers - Edicron Brand Advert
    
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This ERA PFL200 has the same markings as that in the 1975 advert.
The PFL200 valve contains two separate pentode valves in one package. For consumer electronics products cost reduction was vital, and the more functionality within each envelope the better.
The first (the 'F' pentode) is a low power low voltage type with all three grids visible, and the second is a power pentode, probably a beam tetrode from visual observations. To accommodate a pair of pentodes Mullard, the original designers, introduced a 10 pin base.
One particular function of this valve was within colour television receivers. One pentode would drive the CRT cathode, while the other would be employed as part of the colour difference circuitry. Each of the three guns of the shadow mask tube would use one of these valves.
The PFL200 also found service in monochrome receivers. The output pentode was used for the video amplifier to drive the picture tube cathode, while the the amplifier pentode was employed as a sync separator.
The small voltage amplifier is on the left with the larger power device on the right.
The end view of the power amplifier. The suppressor grid support can be seen with the closed notches that hold the wire.
The gaps in the anode of the small pentode allow all three grids to be seen. All are wound to different pitches.
The thin glass tube envelope is 21 mm in diameter and, excluding the B10B base pins, is 70 mm tall.
References: Datasheet & 1040. Type PFL200 was first introduced in 1964.

 

Pin Connections
B10B
1
2
3
4
5
6
7
8
9
10
g1(2)
k,g3(2)
g2(2)
a(2)
h
h
k,g3,s(1)
g1(1)
g2(1)
a(1)

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
16.5
0.3
170
170
-2.6
30
6.5
40k
21

 

Absolute Maximum Operating Conditions
Pentode
Va
Vs
Vg
mAa
mAs
ra
gm
150
150
-2.3
10
3
160k
8.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December05, 2017.
shape:thin.glass.tube construction:all.glass type:double.pentode age:1960.1975 base:b10b heater:300ma pins:10 pin:1.g1(2) pin:2.k.g3(2) pin:3.g2(2) pin:4.a(2) pin:5.h pin:6.h pin:7.k.g3.s(1) pin:8.g1(1) pin:9.g2(1) pin:10.a(1)
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