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NU33

Sensibly equivalent to:
CV1120 CV1290 SU2150A VU120
    
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The NU33 is an EHT rectifier based on the Cossor SU2150A. The CV number is CV1290.
The identification is only in water soluble paint and has been damaged. The saddle construction shouts Cossor but one can not be certain.
See SU2150A for full details.
The main image shows a wire from the cathode wound round and welded to the right hand side heater connection.
The identification within the circle has been washed away.
The classic envelope is 49 mm in diameter and, excluding the B4 base pins, is 130 mm tall.
Reference: Datasheet.

 

Pin Connections
B4
1
2
3
4
tc
-
-
h,k
h
a

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
2.0
1.5
5000
10
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 13, 2019.
shape:classic construction:pinch type:rectifier.hw age:1930.1940 base:b4 heater:2.0v pins:4 pin:1.- pin:2.- pin:3.h.k pin:4.h pin:tc.a
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