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CV455

Sensibly equivalent to:
12AT7WA 12AT7 B309 CV4024 CV5212 E2157 ECC81
See also:
Pin Compatible Double Triodes
    
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The CV455 is a VHF double triode, useful for RF stages, oscillators and frequency multipliers. The commercial type designation is ECC81. The American 12AT7 was the prototype.
The interesting point to this exhibit is that it was made during the cold war in the GDR (East Germany) then part of the Warsaw Pact but with the British CV designation as used by NATO.
There is bold lettering on the glass but we are not sure waht is says.
The anodes are folded and stitched on one side, making an asymmetric design.
The two triode sections with the screen between.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 48 mm tall.
References: Datasheet & 1040.

 

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

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.3
170
-1
8.5
11k
5.9
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 29, 2016.
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