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3C33

 
    
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The 3C33 is a twin triode power amplifier. The circuit given in the datasheet shows the valve being used as a switch driven hard by a square wave generator.
The RCA Transmitting Tube manual describes the 3C33 as being for industrial control and voltage regulation.
Thanks to Bob Hopkins for sending the image.
The wide glass tube envelope is 48 mm in diameter, and excluding the B8A base pins is 78 mm tall.
Reference: Datasheet & 4038. Type 3C33 was first introduced in 1946.

 

Pin Connections
B7A
1
2
3
4
5
6
h
g1(2)
a(2)
k
a(1)
g1(1)

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
12.6
1.125
2000
-200
500
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 20, 2013.
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