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CV818

Sensibly equivalent to:
3Q4 DL95 N18
    
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The CV818 is a miniature dry battery output pentode. The commercial M-OV N18 has an identical specification.
The CV818 was specified for portable radio receiver use. The output of 270 mW maximum would only drive a small efficient loudspeaker, not hi-fi.
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 bright anode covers the internal structure.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.
References: Data-sheet, 3002 & 1040.

 

Pin Connections
B7G
1
2
3
4
5
6
7
f-
a
g1
g2
fct,g3
a
f+

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
1.4
0.1
90
90
-4.5
9.5
2.1
100,000
2.15
0.27
7%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated May 07, 2025.
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