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5Z4

Sensibly equivalent to:
CV1864 VT-74
See also:
Metal Striptease
    
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The 5Z4 was designed to supply equipment of up to 40 Watts total power, this rectifier was made by several manufacturers. This suggests it became a very popular type. In addition to the commercial 5Z4 designation this valve is also marked VT-74 as the US Government Type designation.
The 5Z4, originally this metal valve design, was also made with a large glass envelope as the 5Z4G and a glass tubular envelope as the 5Z4GT.
Made in the USA by Ken-Rad.
The thin metal tube envelope is 25 mm in diameter and excluding the IO base pins, is 68 mm tall.
References: Datasheet, 1040 & 1043. Type 5Z4 was first introduced in 1935.

 

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 11, 2017.
shape:thin.metal.tube construction:glass.disc 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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