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CV4068

Sensibly equivalent to:
13D3 6158 CV2212 VX7124
    
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The CV4068 is a double triode. Its commercial equivalent is the 6158 which is the special quality version of the 13D3.
The 6158 was designed to operate as a Class B push-pull audio amplifier. The only Brimar manual we have that lists the 6158 is from 1961. We believe that this Type was issued in around 1960.
The side view shows the separate electrode systems.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins, is 48 mm tall.
References: Data-sheet, 1040 & 4062. Type CV4068 was first introduced in 1960.

 

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
μ
6.3
0.6
250
-4.6
6.0
14,000
2.3
32
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 16, 2013.
shape:thin.glass.tube construction:all.glass type:double.triode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.a pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.a pin:7.g1 pin:8.k pin:9.hct
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