Tube Substitutions for:
PH4
Pentagrid-Converter (Heptode)
| Type | Substitutes | Base Diagram |
|---|---|---|
| PH4 | 6A8G, 6A8GT, 6A8GTX, 6A8MG, 6D8*, 6A8 |  |
| Notes: | * - Parallel filaments | |
| Web References | PH4 @ RadioMuseum.org | |
Pentagrid-Converter (Heptode)
MECHANICAL DATA
| Basing | 8A |