Tube Substitutions for:
VT91
| Type | Substitutes | Base Diagram |
|---|---|---|
| VT91 | 6J7, 6J7G, 6J7GT, 6J7GTX, 6J7MG, 6W7G*, 1223, 1620, 7000 |  |
| Notes: | * - Parallel filaments |
MECHANICAL DATA
| Basing | 7R |
| Type | Substitutes | Base Diagram |
|---|---|---|
| VT91 | 6J7, 6J7G, 6J7GT, 6J7GTX, 6J7MG, 6W7G*, 1223, 1620, 7000 | |
| Notes: | * - Parallel filaments |
| Basing | 7R |