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CV4029

Sensibly equivalent to:
5902 EL71
    
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The CV4029 is a special quality EL71 sub-miniature audio output valve. The glass carries two designations: 5902 and CV4029.
The two inner grids are aligned and pass flat across the cathode. G3 looks to be four rods that connect to the top screen, effectively a beam tetrode.
The heater wire is coiled and insulated.
The thin glass tube envelope is 10 mm in diameter and, excluding the base wires, is 41 mm tall.
Reference: Data-sheet. Type CV4029 was first introduced in 1954. See also 1954 adverts.

 

Pin Connections
B8D & B8D/F
1
2
3
4
5
6
7
8
g1
g3
h
g3
a
h
g2
g3

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
rk
rl
Pout
D
6.3
0.45
110
110
-8.3
30.0
2.0
15,000
4.2
270
3,000
1.0W
10%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 04, 2022.
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