▼ Menu

U33

 
    
Extras ▼

 

The U33 is a low current half wave EHT rectifier. The effective series resistance required to protect the cathode is 100 kΩ.
The Marconi paper label.
The wide cylindrical anode
The filament sits in the centre of the anode. The filament is a helix that is supported only at the ends.
The wide glass tube envelope is 29 mm in diameter, and excluding the B4 base pins is 96 mm tall.
References: Datasheet, 1040 & 1043.

 

Pin Connections
B4
1
2
3
4
tc
-
-
f
f
a

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
2.0
0.1
6,300
3.0
Updated January 21, 2018.
shape:wide.glass.tube construction:all.glass type:rectifier.hw base:b4 heater:2.0v pins:4 pin:1.- pin:2.- pin:3.f pin:4.f pin:tc.a
Return to Main Index