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20F2

 
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Valves and their Habits
    
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The 20F2 screened RF pentode was designed for use in universal (ie no mains transformer) sets with a series connected heater chain. Mostly in television receivers at RF or as a sync separator.
The thin glass tube envelope is 20 mm in diameter and, excluding the B8A base pins, is 52 mm tall.
References: Datasheet, 1040 & 3002. Type 20F2 was first introduced in 1949.

 

Pin Connections
B8A
1
2
3
4
5
6
7
8
h
a
s
g3
g2
g1
k
h

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
11.0
0.2
135
135
-1.3
27
6.5
10.6
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 15, 2013.
shape:thin.glass.tube construction:all.glass type:pentode age:1940.1950 base:b8a heater:200ma pins:8 pin:1.h pin:2.a pin:3.s pin:4.g3 pin:5.g2 pin:6.g1 pin:7.k pin:8.h
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