| Type | Substitutes | Base Diagram |
|---|---|---|
| 6SF5 | 6SF5GT |  |
| Web References | 6SF5 (RCA (HB3)) @ Franks Electron Tubes 6SF5 (Sylvania) @ Franks Electron Tubes 6SF5 (Tung-Sol) @ Franks Electron Tubes 6SF5 (RCA) @ Franks Electron Tubes 6SF5 @ RadioMuseum.org | |
| Bulb | MT-8 |
| Base | Octal |
| Basing | 6AB |
| Mounting | Any position |
| Heater Voltage (A.C. or D.C.) | 6.3 | Volts |
| Heater Current | 300 | Ma |
| Grid-Plate Capacitance1 | 2.4 | ��f |
| Grid-Cathode Capacitance1 | 4.0 | ��f |
| Plate-Cathode Capacitance1 | 3.6 | ��f |
| Plate Voltage | 250 | Volts |
| Grid Voltage | -2 | Volts |
| Plate Current | 0.9 | Ma |
| Plate Resistance | 66000 | Ohms |
| Amplification Factor | 100 | X |
| Transconductance | 1500 | �mhos |
| 1 | With shell connected to cathode. Values are approximate. |