Tube Substitutions for:
1603
Vacuum Pentode
| Type | Substitutes | Base Diagram |
|---|---|---|
| 1603 | 6C6, 7700 |  |
| Web References | 1603 (RCA (HB3)) @ Franks Electron Tubes 1603 @ RadioMuseum.org | |
Vacuum Pentode
MECHANICAL DATA
| Basing | 6F |
| Type | Substitutes | Base Diagram |
|---|---|---|
| 1603 | 6C6, 7700 | |
| Web References | 1603 (RCA (HB3)) @ Franks Electron Tubes 1603 @ RadioMuseum.org | |
| Basing | 6F |