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CV2136

Sensibly equivalent to:
6BW6 CV4043 VX7062
    
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The CV2136 is the Common Valve, as specified by the UK Government, equivalent of the 6BW6 but based on the VX7062. The valve is essentially the once-ubiquitous Octal type 6V6G squeezed into a B9A envelope. The nominal ratings of the two types are identical. Not surprisingly, 6BW6s usually run (very) hot and require good ventilation if they are not to 'die' prematurely.
Since the whole idea of making B9A versions of standard Octal radio valves was to enable sets to be made smaller, overheating was common.
The 6BW6/CV2136 was most common in radio transmitters for the audio power stages of the amplitude modulator. In the latter application, with 315 Volts on the anodes, a pair would produce 30 Watts in class AB1.
The 6BW6/CV2136 can also generate RF power at a few tens of megahertz.
In the 1960s this valve was still current production for its manufacturers Brimar.
Special quality versions of the 6BW6 were developed. See CV4043 and CV4045.
The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins measures 58 mm in length.
References: Datasheet & 1040. Type CV2136 was first introduced in 1950.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
ic
g1
k
h
h
nc
a
g2
g3

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
6.3
0.45
315
225
-13
34
2.2
77k
3.75
5.5
12%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 12, 2013.
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