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NC10

Sensibly equivalent to:
3220K ACR2X CV959
    
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The NC10 is an electrostatically deflected CRT it is identical to the Army ACR2X and was later known as the CV959. The prototype was the 3220K.
The NC10 is a five inch tube with a maximum diameter of the bell of 127 mm.
The ACR2X is describes as a low sensitivity version of the ACR1(CV1379) and was used in gun laying radar for anti-aircraft guns during the period 1939-45.
To achieve lower inductance in the deflection circuits all four deflection plates are brought out to side contacts.
The neck showing the ACR2X and the words Admiralty Pattern W.1851.
The face plate is curved and not flat. The curve was required to prevent implosion. ie to maintain the glass under compression. Flat CRT face-plates came later with developments in material science.
The side clip bas. Standard 4mm plugs fit into the clips.
The gun assembly and final anode side contact.
The five side contacts. The final anode, Y plates and finally the X plates on the right.
The bell and screen.
The NC10 seen from the screen end.
Another view of the gun, focus anode and accelerating anodes.
The end window envelope is 52 mm in diameter, and excluding the base pins is 485 mm tall.
Reference: Datasheet.

 

Pin Connections
1
2
3
4
5
6
SC
k
g1
h
h
a2
a1
a3

 

Absolute Maximum Operating Conditions
CRT
Vh
Ah
Va
4.0
1.1
3,000
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 22, 2018.
shape:end.window construction:pinch type:cathode-ray.tube age:1940.1950 base: heater:4.0v pins:6 pin:1.k pin:2.g1 pin:3.h pin:4.h pin:5.a2 pin:6.a1 pin:sc.a3
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