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CV4028

Sensibly equivalent to:
0B2WA 6074 CV1833 CV4101 M8224
    
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The CV4028 gas discharge voltage stabiliser is the UK Government version of the commercial 0B2WA B7G voltage stabiliser and both designations appear on the envelope indicating a direct equivalence.
The regulation of this tube was 3 Volts for currents of between 5 and 30 mA. The CV4028/0B2WA is a special quality version of the commercial 0B2 and the regulation is tighter at 3 volts. The CV1833 is the CV version of the 0B2.
The striking voltage for the 0B2WA is 133 volts.
The KB/D identifies this valve as being made to specification K1001 or K1006, the B denotes qualification by a UK authority and the D identifies the maker as Mullard Radio Valve Co., Mitcham.
The thin glass tube envelope is 19 mm in diameter and, excluding the B7G base pins, is 58 mm tall.
Reference: Data-sheet. Type CV4028 was first introduced in 1955. See also 1955 adverts.

 

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

 

Absolute Maximum Operating Conditions
Stabiliser
Va
mAa
108
30
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 02, 2024.
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