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CV4048

Sensibly equivalent to:
0G3 85A2 CV449 M8090 QS1212 VX8098
See also:
SQ Voltage reference tubes
    
Extras ▼

 

The CV4048 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. The original commercial version is the 85A2 (CV449). The electrically identical M8142 (CV4054) has flying leads.
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.
The thin glass tube envelope is 17 mm in diameter and excluding the B7G base pins, is 45 mm tall.
References: Datasheet. Type CV4048 was first introduced in 1959.

 

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 October 16, 2013.
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