| Type | Substitutes | Base Diagram |
|---|---|---|
| 0Z4A | 0Z4, 0Z4G‡, 1003 |  |
| Notes: | ‡ - ??? | |
| Web References | 0Z4A (RCA (HB3)) @ Franks Electron Tubes 0Z4A (Raytheon) @ Franks Electron Tubes 0Z4A (RCA (RC30)) @ Franks Electron Tubes 0Z4A @ RadioMuseum.org | |
| Bulb | MT-8 |
| Base1 | Small Wafer Octal 6-Pin |
| Outline | 8-3 |
| Basing2 | 4R |
| Cathode | Cold |
| Mounting Position | Any |
| Heater Voltage | None Required |
| Peak Starting Plate Supply Voltage (Min) | 300 | Volts |
| Peak Plate to Plate Voltage | 1000 | Volts |
| Peak Inverse Plate Voltage | 880 | Volts |
| Peak Plate current | 200 | Ma |
| D C Output Current (Max) | 85 | Ma |
| D C Output Current (Min) | 30 | Ma |
| D C Output Voltage | 300 | Volts |
| Average Dynamic Tube Voltage Drop | 24 | Volts |