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12AT7

Sensibly equivalent to:
6060 B152 B309 CV455 E2157 ECC81
See also:
Valves and their Habits - Pin Compatible Double Triodes - Mufax Chart Recorder Maintenance Manual
    
Extras ▼

 

The 12AT7 double triode is equivalent to the Mullard ECC81. This type of valve was designed for RF use and is of the low impedance type.
The Sylvania name and Made in USA.
The twin triode sections seen end on. There is no additional screening between the sections.
The thin glass tube envelope is 20 mm in diameter and excluding B9A base pins the length is 46 mm.
References: Datasheet & 1040. Type 12AT7 was first introduced in 1947.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
a(2)
g1(2)
k(2)
h
h
a(1)
g1(1)
k(1)
hct

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.3
250
2.0
10.0
10,000
5.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 13, 2017.
shape:thin.glass.tube construction:all.glass type:double.triode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.a(2) pin:2.g1(2) pin:3.k(2) pin:4.h pin:5.h pin:6.a(1) pin:7.g1(1) pin:8.k(1) pin:9.hct
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