Tube Substitutions for:
3S4
Pentode Power Amplifier
| Type | Substitutes | Base Diagram |
|---|---|---|
| 3S4 | 3Q4ยง, 3W4*, 3Z4, 3S4SF*, 3Z4* |  |
| Notes: | * - Parallel filaments | |
| Web References | 3S4 (Mazda-Belvu) @ Franks Electron Tubes 3S4 (Sylvania) @ Franks Electron Tubes 3S4 (Tung-Sol) @ Franks Electron Tubes 3S4 (Sylvania) @ Franks Electron Tubes 3S4 (Brimar) @ Franks Electron Tubes 3S4 @ RadioMuseum.org | |
Pentode Power Amplifier
MECHANICAL DATA
| Basing | 7BA |
ELECTRICAL DATA
HEATER CHARACTERISTICS
| Heater Voltage | 2.8/1.4 | Volts |
| Heater Current | 0.05/0.10 | A |