Tube Substitutions for:
22
Sharp Cutoff Tetrode
| Type | Substitutes | Base Diagram |
|---|---|---|
| 22 |  | |
| Web References | 22 (RCA) @ Franks Electron Tubes 22 (Sylvania) @ Franks Electron Tubes 22 @ RadioMuseum.org | |
| Type | Substitutes | Base Diagram |
|---|---|---|
| 22 | | |
| Web References | 22 (RCA) @ Franks Electron Tubes 22 (Sylvania) @ Franks Electron Tubes 22 @ RadioMuseum.org | |
| Bulb | S-14 |
| Cap | Small Metal |
| Base | Medium 4 Pin |
| Basing | 4K |
| Filament Voltage | 3.3 | Volts |
| Filament Current | 0.132 | Amps |
| Grid-Plate Capacitance | 0.02 | ��f |
| Input Capacitance | 3.0 | ��f |
| Output Capacitance | 12.0 | ��f |
| Plate Voltage | 135 | 135 | Volts |
| Screen Voltage | 451 | 67.52 | Volts |
| Grid Voltage | -1.5 | -1.5 | Volts |
| Plate Current | 1.7 | 3.7 | Ma |
| Screen Current | 0.6 | 1.3 | Ma |
| Plate Resistance | 725000 | 325000 | Ohms |
| Amplification Factor | 270 | 160 | x |
| Transconductance | 375 | 500 | �mhos |
| 1 | Maximum value of grid resistor is 5.0 Megohoms. |
| 2 | Maximum value of grid resistor is 1.0 Megohoms. |