Tube Substitutions for:
8447
Double Diode-Triode
| Type | Substitutes | Base Diagram |
|---|---|---|
| 8447 | 12BR7, 12BR7A |  |
| Web References | 8447 (Tung-Sol) @ Franks Electron Tubes 8447 @ RadioMuseum.org | |
Double Diode-Triode
MECHANICAL DATA
| Basing | 9CF |
| Type | Substitutes | Base Diagram |
|---|---|---|
| 8447 | 12BR7, 12BR7A | |
| Web References | 8447 (Tung-Sol) @ Franks Electron Tubes 8447 @ RadioMuseum.org | |
| Basing | 9CF |