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VCR97 / 10E/222 CRT

VCR97 The CRT measures approx 410x155mm overall and weighs 900g.

The VCR97 CRT was developed for ASV and was the first tube designed specifically for airborne applications. The display colour is green. It was the prototype for other tubes, and the smaller screened and shorter VCR138 shares the same gun.

The number 8997 appears on the ceramic disk at the base of the gun assembly, and also on the glass.

Heater voltage 4V
Heater current 1A
Typical operating conditions
Final anode voltage 2kV
Second anode voltage 350V
First anode voltage 2kV
Beam current 200µA
X-plate sensitivity 600/Va3 mm/V
Y-plate sensitivity 1140/Va3 mm/V

The CRT is usually operated with A1, A3 and the conductive coating tied together, so on some versions the A1 and/or the Internal Coating connections may be omitted.

Pin Function
1 G
2 C
3 H
4 H
5 A1
6 A2
7 Internal coating
8 Y2
9 X2
10 A3
11 X1
12 Y1


VCR97

VCR97 base VCR97 screen VCR97 gun

 

Another example, this time with the identification label. This one carries the serial number 29572 and has 13D628X written on the bell. As can be seen, the gun assembly of this tube differs from the other. In addition the glass is clear and the deflectors can be seen.

VCR97 gun

This file was last modified 10:17:32, Thursday April 02, 2009