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3S4

Sensibly equivalent to:
1P10 CV484 CV820 DL92 N17
See also:
CV484 short entry - CV820 short entry
    
Extras ▼

 

The 3S4 is an audio output pentode valve designed for battery portable broadcast radio receivers. The output power is very small so either a high efficiency loud speaker would be used or headphones. The design dates to the late 1940's.
The thin glass tube envelope is 18 mm in diameter and excluding the B7G base pins it is 43 mm tall.
References: Datasheet, 1040 & 1043. Type 3S4 was first introduced in 1941.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
1.4
0.1
90
67.5
-7
7.4
1.4
0.1M
1.58
0.27
12%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 07, 2015.
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