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CV449

Sensibly equivalent to:
0G3 85A2 CV4048 QS1209 QS83/3 VX375
See also:
SQ Voltage reference tubes
    
Extras ▼

 

The CV449 is a small, special quality voltage stabiliser. The striking voltage is 115 Volts and the maintaining voltage is 85 Volts. For a tube current variation of 1 mA to 10 mA the voltage regulation is 4 Volts.
This valve would have been used to directly stabilise the voltage for an oscillator or be employed as a voltage reference for a stabilised supply. In the latter case the tube would be operated at constant current.
See Mullard 85A2 for the commercial version.
The English Electric logo and identification.
TheThe other logo and reference code.
The thin glass tube envelope is 18 mm in diameter and excluding the B7G base pins, is 46 mm long.
References: Datasheet.

 

Pin Connections
B7G
1
2
3
4
5
6
7
a
k
ic
k
a
ic
k

 

Absolute Maximum Operating Conditions
Stabiliser
Va
85
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 25, 2014.
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