Virtual Valve Museum

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CV1596 CRT

Size This CRT measures 380x110mm overall and has a 12 pin B12B base.

This is an electrostatic deflection split beam CRT, prototype VCR518A.

Heater voltage 4V
Heater current 1.1A
Max third anode voltage 2kV
Max grid voltage -500V
X-plate sensitivity 558/Va3 mm/V
Y-plate sensitivity 370/Va3 mm/V
Typical operating conditions
Second anode voltage 345V
Third anode voltage 1.2kV
Hood * (fourth anode) voltage 1.23kV
Modulator voltage -14V
Cathode current 135µA
Beam current 15µA

The Hood is an electrostatic shield around the deflecting system. The first and third anodes are tied together internally.

Pin Function Pin Function
1 Cathode 7 Hood (fourth anode)
2 Grid 8 Y2
3 Heater 9 X2
4 Heater 10 Third anode
5 - 11 X1
6 Second anode 12 Y1

Viewing the screen with the key on the base downwards, a +ve voltage on X1 will deflect both spots to the left, a +ve voltage on Y1 will deflect one spot upwards, and a +ve voltage on Y2 will deflect the other spot downwards.


Quarter view