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VT-4C

Sensibly equivalent to:
211 4C21 CV2576 JAN
    
Extras ▼

 

The VT-4C is the commercial Type 211 as specified by the US Government. It is a directly heated audio power triode for amplifier and modulator service. It is also rated for RF amplification.
As a single ended device in class A1 the output is just under 20 Watts. As a class B push-pull amplifier that output rises to 260 Watts.
The locating pip on the base shell. The valve holder is of the bayonet locking type. The main components are rigidly held by supports fixed to a collar around the pinch stem.
The anode is graphite. Our UV-211 has a metal anode. The supports are substantial and made of ceramic.
The top support and the two filament tension springs.
In tis view for the filament support rods the top of the oxide coated filament can be seen within the grid winding.
Fixed into the heavy ceramic valve holder.
The ceramic valve holder. The cups for the filament pins and the springs for grid and anode connections.
The wide glass tube envelope is 57 mm in diameter and, excluding the base pins, is 183 mm tall.
Reference: Datasheet.

 

Pin Connections
1
2
3
4
g1
f
a
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
10.0
3.25
1,250
-80
60.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December23, 2019.
shape:wide.glass.tube construction:pinch type:triode age:1930.1940 base: pins:4 pin:1.g1 pin:2.f pin:3.a pin:4.f
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