Tube Substitutions for:
T77
Vacuum Pentode
| Type | Substitutes | Base Diagram |
|---|---|---|
| T77 | 1221, 1223, 57A*, 57AS*, 77, 7700, 6C6 |  |
| Notes: | * - Parallel filaments | |
| Web References | T77 @ RadioMuseum.org | |
Vacuum Pentode
MECHANICAL DATA
| Basing | 6F |
| Type | Substitutes | Base Diagram |
|---|---|---|
| T77 | 1221, 1223, 57A*, 57AS*, 77, 7700, 6C6 | |
| Notes: | * - Parallel filaments | |
| Web References | T77 @ RadioMuseum.org | |
| Basing | 6F |