Tube Substitutions for:
77
Sharp Cutoff Pentode
| Type | Substitutes | Base Diagram |
|---|---|---|
| 77 | 6C6, 57, 57A*, 57AS* |  |
| Notes: | * - Parallel filaments | |
| Web References | 77 (RCA) @ Franks Electron Tubes 77 (Sylvania) @ Franks Electron Tubes 77 (Tung-Sol) @ Franks Electron Tubes 77 (Brimar) @ Franks Electron Tubes 77 @ RadioMuseum.org | |
Sharp Cutoff Pentode
MECHANICAL DATA
| Basing | 6F |
ELECTRICAL DATA
HEATER CHARACTERISTICS
| Heater Voltage | 6.3 | Volts |
| Heater Current | 0.3 | A |