Tube Substitutions for:
DF904
Vacuum Pentode
| Type | Substitutes | Base Diagram |
|---|---|---|
| DF904 | 1AF4*, 1U4WA, 1U4 |  |
| Notes: | * - Parallel filaments | |
| Web References | DF904 @ RadioMuseum.org | |
Vacuum Pentode
MECHANICAL DATA
| Basing | 6AR |
| Type | Substitutes | Base Diagram |
|---|---|---|
| DF904 | 1AF4*, 1U4WA, 1U4 | |
| Notes: | * - Parallel filaments | |
| Web References | DF904 @ RadioMuseum.org | |
| Basing | 6AR |