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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 commercialN18 is identical and both Types appear on the glass.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 commercial N18 designation. Two tensioning springs can be seen at the top with two filament strands passing through the grids.
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 March 30, 2021.
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