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CB215S

 
See also:
Quiescent Push-Pull - A New Class B Valve - Applications of the new valves 1935
    
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The CB215 is a double triode audio output valve from 1936. Like similar valves this was designed to offer reasonable volume at minimum consumption from dry cell HT batteries.
The CB215 was designed to provide up to 1.7 Watts of audio with an anode load of 10 kΩ.
The original CB215 on a B7 base dates to 1936. This exhibit was the 'S' variant of 1938 with the Ct8 side contact base.
Thanks to Mark Mallison for sending the image.
The classic envelope is  mm in diameter, and excluding the Ct8 base pins, is  mm tall.
Reference: 1043. Type CB215S was first introduced in 1938.

 

Pin Connections
Ct8
1
2
3
4
5
6
7
8
h
-
a(1)
g1(1)
g1(2)
a(2)
-
h

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
Pout
2.0
0.22
135
0
-
1.7W
Updated October 13, 2019.
shape:classic construction:pinch type:double.triode age:1930.1940 base:ct8 heater:2.0v pins:8 pin:1.h pin:2.- pin:3.a(1) pin:4.g1(1) pin:5.g1(2) pin:6.a(2) pin:7.- pin:8.h
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