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7B7

Sensibly equivalent to:
CV522 W149
See also:
American Loctal Valves
    
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The 7B7 is a high impedance variable μ amplifier pentode. It was designed for RF & IF amplifier use, with a tuned anode circuit.
There are few places on the circular screen where a glimpse of the grids is possible.
The anode connection is a thick rod passing straight down to base pin 2 and is shielded by an extension of the main screen. This can be seen on the right.
The wide glass tube envelope is 28 mm in diameter and, excluding the B8B base pins, is 56 mm tall.
References: Datasheet & 1040.

 

Pin Connections
B8B
1
2
3
4
5
6
7
8
h
a
g2
g3
s
g1
k
h

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.15
250
100
-3
8.5
1.7
0.75M
1.75
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated August 24, 2015.
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