The ACR10 is a three inch electro-statically deflected CRT used by the British Army. It was renamed the CV1382 when the Common Valve system was introduced in 1941.
The screen is 69 mm in diameter at the outside edges. The phosphor glow green in use. The final anode is the black colloidal graphite coating between the gun and the screen.
The base pins are corroded and some are bent.
The electrons are emitted from the circular hole in the cathode assembly and are focussed and accelerated by the electrostatic fields on and between the tubes between the cathode and the deflection plates. The small Y plates are flared to allow the beam be move without touching the metal. The much larger X plates are placed just inside the graphite coating. They are also flared and are less sensitive that the Y plates as they are further apart to accommodate the deflected electron stream.
A closer view of the gun assembly. Electrostatically deflected tubes rely on the critical spacing of the electrodes and are thus more expensive to build than magnetically deflected types.
The end window envelope is 41 mm in diameter, and excluding the B12B base pins is 176 mm tall.
