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5Z4G

Sensibly equivalent to:
52KU AU13 CV1863 GZ32 R52 U50
    
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This exhibit is a Ferranti 5Z4G full wave rectifier. Professional equipment, including radar, etc., sometimes required circuits in which valve cathodes carried large signals and had to 'float' at voltages well below that of the chassis. Glass-envelope '-G' versions of common types were therefore required.
Designed to supply equipment of up to 40 Watts total power, this rectifier was made by several manufacturers. This suggests a very popular type, and one that found use in military equipment during WWII.
The Ferranti name printed on the glass.
The two rectifier sections. Each anode has two rows of holes.
The rods between the sections hold the top mica and are also the connections for the anodes. The connection is made above the top mica.
The classic envelope is 44 mm in diameter and, excluding the IO base pins, is 100 mm tall.
References: Datasheet, 1043 & 1040. Type 5Z4G was first introduced in 1940.

 

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

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
5.0
2.0
350
125
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 24, 2018.
shape:classic construction:pinch type:rectifier.fw age:1930.1940 base:io heater:5.0v pins:8 pin:1.m pin:2.h pin:3.nc pin:4.a(2) pin:5.nc pin:6.a(1) pin:7.nc pin:8.h.k
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