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CV1347

Sensibly equivalent to:
ARTH2 CV281 CV1099 CV1581 CV1944 ECH35 X61M X61
    
Extras ▼

 

The CV1347 was originally known as the ARTH2. The AR Stands for Army Receiving.
The Mullard ECH35 Triode Hexode was the commercial equivalent and prototype.
The KB/DA identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the DA identifies the maker as Mullard Radio Valve Co., Blackburn.
The reverse is plain screening paint.
The classic envelope is 35 mm in diameter, and excluding the IO base pins is 96 mm tall.
Reference: Data-sheet. Type CV1347 was first introduced in 1935. See also 1935 adverts.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
m
h
a
g2,g4
g1(t),g3
a(t)
h
k
g1

 

Absolute Maximum Operating Conditions
Hexode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.3
300
100
-2.0
2.2
3.0
1.3M
0.65

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
150
3.3
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 26, 2024.
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