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12AT7

Sensibly equivalent to:
6060 B152 B309 CV455 E2157 ECC81
See also:
Valves and their Habits - Pin Compatible Double Triodes - Brimar FM Valves Advert - Brimar 12AT7 Advert - Brimar 12AT7 Advert - Brimar 12AT7 Advert
    
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This double triode is equivalent to the Mullard ECC81. The device was designed for RF use and is of the low impedance type.
We have another Brimar 12AT7 in the collection. The difference being in the cosmetic appearance.
The anode is strengthened by pressing a ridge in the broad face.
The thin glass tube envelope is 20 mm in diameter and excluding B9A base pins the length is 47 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
0.6
250
2.0
10.0
10,000
5.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated August 06, 2016.
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