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12B8GT

Sensibly equivalent to:
CV911
    
Extras ▼

 

the 12B8GT is a triode pentode for use in AC/DC receivers. The Pentode has a vari-μ characteristic for AGC control of stage gain.
The Tung-Sol name is on the base cap.
The latest test results are on this sticker.
The Type designation is printed faintly on the envelope.
The wide glass tube envelope is 29 mm in diameter and, excluding the IO base pins, is 71 mm tall.
References: Data-sheet. Type 12B8GT was first introduced in 1940. See also 1940 adverts.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
k
h
a
g2
a(t)
k(t)
h
g1(t)
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
μ
12.6
0.3
90
90
-3.0
7.0
2.0
0.2M
1.8
360
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 16, 2024.
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