▼ Menu

CV2127

Sensibly equivalent to:
6132 6CH6 7D10 CV4055 EL821
    
Extras ▼

 

The CV2127 (commercially the EL821 or 6CH6) is a video output pentode for TV and Radar. The commercial equivalent is type as can be seen on the envelope.
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.
British Made EL821 from Mullard also labelled CV2127 for the UK Government.
The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins measures 57 mm tall.
References: Data-sheet, 1040, 3002. Type CV2127 was first introduced in 1952. See also 1952 adverts.

 

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
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.75
250
250
-4.5
40
6
50k
11
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 17, 2025.
Return to Main Index