Virtual Valve Museum

Virtual Valve Museum

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Size This CRT measures 372x85mm overall and has an EM8 base


This is an electrostatically deflected CRT described as a high-speed tube.

Heater voltage 4V
Heater current 1.2A
Max final anode voltage 2kV
Max continuous cathode current 1mA
X-plate sensitivity 620/Va3 mm/V
Y-plate sensitivity 530/Va3 mm/V
Each X-plate to all other electrodes 12pF
Each Y-plate to all other electrodes 8pF
Grid to all other electrodes 10pF
One X- to one Y-plate 0.013pF


Pin Function
1 Anode 2
2 Heater
3 Cathode
4 Heater
5 Grid
6 X2
7 Anode 1 and Anode 3
8 X1
Side contacts * Y1 and Y2

*: The base shell is arranged as 3 pins and 5 pins with a gap between each set. The Y1 side connector is aligned with the 3 pin 'side' of the base

Quarter view