Tube Substitutions for:
N18
Vacuum Pentode
| Type | Substitutes | Base Diagram |
|---|---|---|
| N18 | 3S4§, 3S4SF*§, 3W4*§, 3Q4 |  |
| Notes: | * - Parallel filaments § - May not work in all circuits | |
| Web References | N18 (Marconi) @ Franks Electron Tubes N18 @ RadioMuseum.org | |
Vacuum Pentode
MECHANICAL DATA
| Basing | 7BA |