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6CB6A

Sensibly equivalent to:
6CF6 EF190
See also:
The EF91 and the Blue Band
    
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The 6CB6A is a short cut-off high impedance voltage amplifier pentode.
The construction is similar to the EF91 including the coating on the inside of the envelope to reduce out gassing from the glass, but they are not pin compatible. Unlike the EF91 the electrode between the central area and the outer anode on each side is a beam plate.
The envelope is 18 mm in diameter and, excluding the B7G base pins, is 46 mm tall.
Reference: Datasheet. Type 6CB6A was first introduced in 1957.

 

Pin Connections
B7G
1
2
3
4
5
6
7
g1
k
h
h
a
g2
g3

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
mAa
mAs
ra
gm
6.3
0.3
200
150
9.5
2.8
0.6M
6.2
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December27, 2016.
shape:thin.glass.tube construction:all.glass type:beam.tetrode age:1950.1960 base:b7g heater:6.3v pins:7 pin:1.g1 pin:2.k pin:3.h pin:4.h pin:5.a pin:6.g2 pin:7.g3
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