▼ Menu

VI77

Sensibly equivalent to:
AW6 CV1077 EM31
    
Extras ▼

 

The VI77 is a magic eye tuning indicator. The prototype was the EM31. Other service names were AW6 and later CV1077.
VI would be an RAF designation and AW the Army designation.
The triode amplifier sits below the display unit.
Thanks to Mark Mallison for sending the images.
The wide glass tube envelope is  mm in diameter and, excluding the IO base pins, is  mm tall.
Reference: Datasheet.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
-
h
a
t
g1
-
h
k

 

Absolute Maximum Operating Conditions
CRT
Vh
Ah
Va
6.3
0.2
250
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December23, 2019.
shape:wide.glass.tube construction:pinch type:tuning.indicator age:1930.1940 base:io heater:6.3v pins:8 pin:1.- pin:2.h pin:3.a pin:4.t pin:5.g1 pin:6.- pin:7.h pin:8.k
Return to Main Index