Tube Substitutions for:
4MK8
Double Pentode
| Type | Substitutes | Base Diagram |
|---|---|---|
| 4MK8 | 4BU8, 4GS8, 4HS8, 4KF8 |  |
| Web References | 4MK8 (RCA (RC30)) @ Franks Electron Tubes 4MK8 @ RadioMuseum.org | |
Double Pentode
MECHANICAL DATA
| Basing | 9FG |
| Type | Substitutes | Base Diagram |
|---|---|---|
| 4MK8 | 4BU8, 4GS8, 4HS8, 4KF8 | |
| Web References | 4MK8 (RCA (RC30)) @ Franks Electron Tubes 4MK8 @ RadioMuseum.org | |
| Basing | 9FG |