Type | Substitutes | Base Diagram |
---|---|---|
27 | 56, 27S, 56S, 27A* | |
Notes: | * - Parallel filaments | |
Web References | 27 (RCA) @ Franks Electron Tubes 27 (RCA (HB3)) @ Franks Electron Tubes 27 (Sylvania) @ Franks Electron Tubes 27 (Tung-Sol) @ Franks Electron Tubes 27 @ RadioMuseum.org |
Bulb | S-14 |
Base | Medium 5 Pin |
Basing | 5A |
Filament Voltage | 2.5 | Volts |
Filament Current | 1.75 | Amps |
Grid-Plate Capacitance | 3.3 | ��f |
Grid-Flimaent Capacitance | 3.5 | ��f |
Plate-Flimaent Capacitance | 3.0 | ��f |
Plate Voltage1 | 90 | 135 | 180 | 250 | Volts |
Grid Voltage | -6.0 | -9.0 | -13.5 | -21.0 | Volts |
Plate Current | 2.7 | 4.5 | 5.0 | 5.2 | Ma |
Plate Resistance | 11000 | 9000 | 9000 | 9250 | Ohms |
Amplification Factor | 9.0 | 9.0 | 9.0 | 9.0 | x |
Transconductance | 820 | 1000 | 1000 | 975 | �mhos |
1 | Maximum plate voltage == 275 volts. |