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U147

Sensibly equivalent to:
6X5GT EZ35 U70
    
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The U147 is a full wave HT rectifier for low power AC mains driven equipment. The output of a centre tapped transformer would be applied to the anodes, the rating given is 325-0-325, the common cathode would be the output for the rectified voltage. A effective series resistance of 350 Ohms was required to limit surges and the reservoir capacitor had to be restricted to 16 µF. The valve has two anodes stacked vertically on a common cathode tube.
See 6X5GT for details as this is a near equivalent.
The wide glass tube envelope is 29 mm in diameter and excluding the IO base pins the valve is 77 mm tall.
Reference: 3002. Type U147 was first introduced in 1950.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
m
h
a(2)
-
a(1)
-
h
k

 

Absolute Maximum Operating Conditions
Diode
Vh
Ah
Va
mAa
6.3
0.6
325
70
Updated January 17, 2013.
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