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EZ80

Sensibly equivalent to:
6V4 CV1535
See also:
Mullard EZ80 Advert, February, 1954 - Mullard VHF FM Radio Series Advert, June 1954 - Push-Pull EL91 Amplifier - Noval Based Valves for Audio Amplifiers Advert
    
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The EZ80 full wave rectifier was found in many broadcast receivers and domestic audio equipment.
Suited to the task, at 90 mA maximum current and with a required series resistance of 300 ohms to reduce the initial surge in charging the maximum 50 µF reservoir capacitor, each anode would conduct in turn when connected to either end of a grounded centre tapped mains transformer.
The EZ81 is pin compatible but rated at 160 mA. The older EZ40 has the same rating as the EZ80 and is on a B8A base.
This exhibit says it was British Made, the same wording as the EZ40, but EZ80 with the same older style Mullard logo has the later wording of Made in Great Britain.
The anodes are identical, one pointing up the envelope and the other at right angles pointing down. Maximum radiating area and minimum required space.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 59 mm tall.
References: Datasheet & 1040. Type EZ80 was first introduced in 1954.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
a(2)
ic
k
h
h
ic
a(1)
ic
ic

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
6.3
0.6
350
90
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 20, 2017.
shape:thin.glass.tube construction:all.glass type:rectifier.fw age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.a(2) pin:2.ic pin:3.k pin:4.h pin:5.h pin:6.ic pin:7.a(1) pin:8.ic pin:9.ic
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