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6F18

Sensibly equivalent to:
6EC7 W739
    
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The 6F18 is a variable μ HF pentode for use in broadcast receivers at HF or IF.
The side view showing the anode occupies a large part of the envelope.
The thin glass tube envelope is 21 mm in diameter, and excluding the base pins is 48 mm tall.
References: Datasheet, 1040 & 3002. Type 6F18 was first introduced in 1956.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
μ
6.3
0.2
175
100
-1.3
12.0
3.5
0.22M
4.4
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 08, 2013.
shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.k pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.s pin:7.a pin:8.g2 pin:9.g3
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