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6BW7

Sensibly equivalent to:
64SPT 6BX6 6F28 8D6 CV1376 EF80 Z152 Z719
See also:
The Construction of the EF80 - Valves for Bands III, IV & V - Radio Show 1952
    
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The 6BW7 is an internally screened pentode. It is the Brimar implementation of the standard valve, the Mullard EF80 is the more generally known type designation. While it was designed to occupy the same function zone it is not a straight replacement. It is, however, pin compatible.
As with the EF80 the circuit designer is given maximum flexibility by having all electrodes brought to external pins. Many pentodes have g3, the suppressor grid, internally connected to the cathode.
The end wall of the anode has notches removed from it and within is the suppressor grid.
The thin glass tube envelope is 20 mm diameter and, excluding the B9A base pins, is 48 mm tall.
References: Datasheet & 1040 Type 6BW7 was first introduced in 1952.

 

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
6.7
0.3
250
250
-8
9.5
3.5
0.75M
8.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 20, 2017.
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