CV389 CRT
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This CRT measures 180x44mm overall, and 35mm across the screen. It has a 9 pin base. |
| Heater voltage | 4.0V |
| Heater current | 1.0A |
| Max anode 4 voltage | 4.0kV |
| Max anode 3 voltage | 1.7kV |
| Max anode 2 voltage | 200V |
| Max peak cathode current | 500µA |
| Typical operating conditions | |
| Anode 4 voltage | 3.5kV |
| Anode 3 voltage | 1.5kV |
| Anode 2 voltage | 75V approx |
| Beam current | 30µA |
| Cathode current | 40µA |
| X plate sensitivity | 0.110 mm/V |
| Y plate sensitivity | 0.087 mm/V |
| Pin | Function |
| 1 | Heater and cathode |
| 2 | Grid |
| 3 | Heater |
| 4 | Anode 2 |
| 5 | X plate 1 |
| 6 | Y plate 1 |
| 7 | Anode 1 and anode 3 |
| 8 | Y plate 2 |
| 9 | X plate 2 |
| Side contact | Anode 4 |
When viewing the screen with the tube positioned such that the keyway of the spigot is at an angle of 30 degrees to the left of vertical, a positive voltage on X plate 1 (pin 5) will deflect the spot to the right, and a positive voltage on Y plate 2 (pin 8) will deflect it upwards.
Below: two developmental versions, serials 1725 and 1737. The first has 4976 stamped inside, and the second has 5057.
